3D viewer: fix a minor issue in solder paste rect pads:

the solder paste mask clearance was no taken in account
for rect and trap shapes.

3d-viewer/3d_canvas/create_3Dgraphic_brd_items.cpp

@@ -388,7 +388,7 @@ void CINFO3D_VISU::createNewPadWithClearance( const D_PAD* aPad,
         // see pcbnew/board_items_to_polygon_shape_transform.cpp
 
         wxPoint corners[4];
-        aPad->BuildPadPolygon( corners, wxSize( 0, 0), aPad->GetOrientation() );
+        aPad->BuildPadPolygon( corners, aClearanceValue, aPad->GetOrientation() );
 
         SFVEC2F corners3DU[4];