Fix minor Bug #1542935 (No solder mask unless there is something on the layer)

3d-viewer/3d_draw_board_body.cpp

@@ -572,7 +572,10 @@ void EDA_3D_CANVAS::buildTechLayers3DView( REPORTER* aErrorMessages, REPORTER* a
 
         // bufferPolys contains polygons to merge. Many overlaps .
         // Calculate merged polygons and remove pads and vias holes
-        if( bufferPolys.IsEmpty() )
+        if( layer != B_Mask && layer != F_Mask && bufferPolys.IsEmpty() )
+            // if a layer has no iten to draw, skip it
+            // However solder mask layers are negative layers, so no item
+            // means only a full layer mask
             continue;
 
         // Solder mask layers are "negative" layers.

pcbnew/github/github_plugin.cpp

@@ -194,6 +194,7 @@ MODULE* GITHUB_PLUGIN::FootprintLoad( const wxString& aLibraryPath,
 
     if( it != m_gh_cache->end() )  // fp_name is present
     {
+        //std::string::data() ensures that the referenced data block is contiguous.
         wxMemoryInputStream mis( m_zip_image.data(), m_zip_image.size() );
 
         // This decoder should always be UTF8, since it was saved that way by git.