FP_LIB_TABLE_ROW::LibraryExists(): ensure environment variables are expanded

Fixes https://gitlab.com/kicad/code/kicad/-/issues/19800

common/fp_lib_table.cpp

@@ -66,7 +66,7 @@ void FP_LIB_TABLE_ROW::SetType( const wxString& aType )
 bool FP_LIB_TABLE_ROW::LibraryExists() const
 {
     if( plugin )
-        return plugin->CanReadLibrary( GetFullURI() );
+        return plugin->CanReadLibrary( GetFullURI( true ) );
 
     return false;
 }

pcbnew/autorouter/spread_footprints.cpp

@@ -121,7 +121,7 @@ std::optional<rectpack2D::rect_wh> spreadRectangles( rect_vector& vecSubRects, i
     return result;
 }
 
-#include <wx/log.h>
+
 void SpreadFootprints( std::vector<FOOTPRINT*>* aFootprints, VECTOR2I aTargetBoxPosition,
                        bool aGroupBySheet, int aComponentGap, int aGroupGap )
 {