build: clear 8 warnings - && inside || without parentheses (#15587)

Every edit makes the precedence the compiler already applies explicit. None
of them regroups an expression, so behavior is unchanged at all eight sites.
Strip parentheses and whitespace from the diff and the token stream matches.

GCodeProcessor.cpp:1472 tests == where the symmetric clause below tests !=,
which reads like a typo and is not one. A comment now explains why.

OrcaSlicer.cpp:4760 was the only judgment call. Its leading !is_seq_print is
bare while both operands are parenthesized, so the written form matches what
the compiler does. Kept rather than guessed at.

src/OrcaSlicer.cpp

@@ -4826,7 +4826,7 @@ int CLI::run(int argc, char **argv)
                     }
                 }
 
-                if (!arrange_cfg.is_seq_print && (assemble_plate.filaments_count > 1)||(enable_wrapping_detect && !current_wrapping_exclude_area.empty()))
+                if ((!arrange_cfg.is_seq_print && (assemble_plate.filaments_count > 1))||(enable_wrapping_detect && !current_wrapping_exclude_area.empty()))
                 {
                     //prepare the wipe tower
                     int plate_count = partplate_list.get_plate_count();

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -1468,9 +1468,11 @@ void GCodeProcessor::run_post_process()
 
     // Append a per-filament usage block at a filament change.
     auto handle_filament_change = [&](int filament_id, int cur_line_id, int nozzle_id) {
-        // skip filament changes emitted inside the machine start / end gcode
-        if (m_machine_start_gcode_end_line_id == (unsigned int) (-1) && (unsigned int) (cur_line_id) < m_machine_start_gcode_end_line_id ||
-            m_machine_end_gcode_start_line_id != (unsigned int) (-1) && (unsigned int) (cur_line_id) > m_machine_end_gcode_start_line_id)
+        // Skip filament changes emitted inside the machine start / end gcode. One forward pass assigns
+        // the tag ids and tests them in the same loop, so inside the start gcode the end tag is unseen
+        // and the id still holds the sentinel. That is why the first clause tests == and the second !=.
+        if ((m_machine_start_gcode_end_line_id == (unsigned int) (-1) && (unsigned int) (cur_line_id) < m_machine_start_gcode_end_line_id) ||
+            (m_machine_end_gcode_start_line_id != (unsigned int) (-1) && (unsigned int) (cur_line_id) > m_machine_end_gcode_start_line_id))
             return;
         if (!m_filament_blocks.empty())
             m_filament_blocks.back().upper_gcode_id = cur_line_id;

src/slic3r/GUI/GLCanvas3D.cpp

@@ -2191,7 +2191,7 @@ void GLCanvas3D::render(bool only_init)
 
 	// Negative coordinate means out of the window, likely because the window was deactivated.
 	// In that case the tooltip should be hidden.
-    if (m_mouse.position.x() >= 0. && m_mouse.position.y() >= 0. || has_mouse_capture()) { // ORCA continue to capture mouse pos mid drag
+    if ((m_mouse.position.x() >= 0. && m_mouse.position.y() >= 0.) || has_mouse_capture()) { // ORCA continue to capture mouse pos mid drag
         if (tooltip.empty())
             tooltip = m_layers_editing.get_tooltip(*this);
 

src/slic3r/GUI/Plater.cpp

@@ -3667,8 +3667,8 @@ void Sidebar::update_presets(Preset::Type preset_type)
                 // so extruders without an explicit sub-nozzle count never offer Hybrid. A nullable-int
                 // nil is INT_MAX (> 1) and would otherwise falsely pass the gate, so exclude it too.
                 if (boost::algorithm::contains(extruder_variants->values[index], type + " " + nozzle_volumes_def->enum_labels[i]) ||
-                    extruder_max_nozzle_count->get_at(index) > 1 && extruder_max_nozzle_count->get_at(index) != ConfigOptionIntsNullable::nil_value() &&
-                    nozzle_volumes_def->enum_keys_map->at(nozzle_volumes_def->enum_values[i]) == nvtHybrid) {
+                    (extruder_max_nozzle_count->get_at(index) > 1 && extruder_max_nozzle_count->get_at(index) != ConfigOptionIntsNullable::nil_value() &&
+                    nozzle_volumes_def->enum_keys_map->at(nozzle_volumes_def->enum_values[i]) == nvtHybrid)) {
                     if (nozzle_volumes_def->enum_keys_map->at(nozzle_volumes_def->enum_values[i]) == NozzleVolumeType::nvtHighFlow &&(diameter == "0.2" ||
                         is_skip_high_flow_printer(printer_model)))
                         continue;

src/slic3r/GUI/SelectMachine.cpp

@@ -3073,7 +3073,7 @@ static bool _HasExt(const std::vector<FilamentInfo> &ams_mapping_result) {
     };
 
     for (const auto &info : ams_mapping_result) {
-        if (info.ams_id == VIRTUAL_AMS_MAIN_ID_STR || info.ams_id == VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
+        if (info.ams_id == VIRTUAL_AMS_MAIN_ID_STR || (info.ams_id == VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty())) {
             return true;
         }
     }

src/slic3r/GUI/UnsavedChangesDialog.cpp

@@ -1281,8 +1281,8 @@ static wxString get_string_value(std::string opt_key, const DynamicPrintConfig&
     }
     auto opt_vector = dynamic_cast<const ConfigOptionVectorBase *>(option);
 
-    if (option->is_scalar() && config.option(opt_key)->is_nil() ||
-        option->is_vector() && opt_vector && opt_idx >= 0 && opt_idx < opt_vector->size() && opt_vector->is_nil(opt_idx))
+    if ((option->is_scalar() && config.option(opt_key)->is_nil()) ||
+        (option->is_vector() && opt_vector && opt_idx >= 0 && opt_idx < opt_vector->size() && opt_vector->is_nil(opt_idx)))
         return _L("N/A");
 
     wxString out;