filter out tiny gaps

src/libslic3r/Fill/FillBase.hpp

@@ -74,6 +74,8 @@ struct FillParams
     bool            using_internal_flow{ false };
     //BBS: only used for new top surface pattern
     float           no_extrusion_overlap{ 0.0 };
+    const           PrintRegionConfig* config{ nullptr };
+
 };
 static_assert(IsTriviallyCopyable<FillParams>::value, "FillParams class is not POD (and it should be - see constructor).");