Load the global fp-lib-table before running the Python DRC

Without this we get parity errors for all the KiCad footprints

(cherry picked from commit e5087ca3db)

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -472,6 +472,11 @@ bool WriteDRCReport( BOARD* aBoard, const wxString& aFileName, EDA_UNITS aUnits,
 
     wxCHECK( prj, false );
 
+    // Load the global fp-lib-table otherwise we can't check the libs parity
+    wxFileName  fn_flp = FP_LIB_TABLE::GetGlobalTableFileName();
+    if( fn_flp.FileExists() )
+        GFootprintTable.Load( fn_flp.GetFullPath() );
+
     wxString drcRulesPath = prj->AbsolutePath( fn.GetFullName() );
 
     // Rebuild The Instance of ENUM_MAP<PCB_LAYER_ID> (layer names list), because the DRC