Use case insensitive comparison in symbol footprint filter match DRC.

This keeps the DRC test in line with the ERC test which is also case
insensitive.

pcbnew/drc/drc_test_provider_schematic_parity.cpp

@@ -156,24 +156,26 @@ void DRC_TEST_PROVIDER_SCHEMATIC_PARITY::testNetlist( NETLIST& aNetlist )
 
             if( !m_drcEngine->IsErrorLimitExceeded( DRCE_FOOTPRINT_FILTERS ) )
             {
-                wxString libId = footprint->GetFPID().GetUniStringLibId();
-                wxString fpName = footprint->GetFPID().GetUniStringLibItemName();
+                wxString libIdLower = footprint->GetFPID().GetUniStringLibId().Lower();
+                wxString fpNameLower = footprint->GetFPID().GetUniStringLibItemName().Lower();
                 size_t   filtercount = component->GetFootprintFilters().GetCount();
                 bool     found = ( 0 == filtercount ); // if no entries, do not filter
 
                 for( size_t jj = 0; jj < filtercount && !found; jj++ )
                 {
-                    if( component->GetFootprintFilters()[jj].Find( ':' ) == wxNOT_FOUND )
-                        found = fpName.Matches( component->GetFootprintFilters()[jj] );
+                    wxString filterLower = component->GetFootprintFilters()[jj].Lower();
+
+                    if( filterLower.Find( ':' ) == wxNOT_FOUND )
+                        found = fpNameLower.Matches( filterLower );
                     else
-                        found = libId.Matches( component->GetFootprintFilters()[jj] );
+                        found = libIdLower.Matches( filterLower );
                 }
 
                 if( !found )
                 {
                     wxString msg;
                     msg.Printf( _( "%s doesn't match symbol's footprint filters (%s)." ),
-                                fpName,
+                                footprint->GetFPID().GetUniStringLibId(),
                                 wxJoin( component->GetFootprintFilters(), ' ' ) );
 
                     std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_FOOTPRINT_FILTERS );