Fix tests on all platforms

Try to link tests on Mac.


Fix inaccurate pad brim size


fix build on mac (attempt 2)


Fixes for support tree faults and race conditions in release mode.


Fix crashing test executable on gcc 4.9


fix warning on msvc

src/libslic3r/SLA/SLARaster.hpp

@@ -15,8 +15,6 @@ namespace ClipperLib { struct Polygon; }
 namespace Slic3r { 
 namespace sla {
 
-class Raster;
-
 /**
  * @brief Raster captures an anti-aliased monochrome canvas where vectorial
  * polygons can be rasterized. Fill color is always white and the background is