Fixes to build with wxWidgets 3.3

pcbnew/pcbnew_jobs_handler.cpp

@@ -1824,7 +1824,7 @@ int PCBNEW_JOBS_HANDLER::JobExportDrc( JOB* aJob )
 
         if( netlist_str == annotateMsg )
         {
-            m_reporter->Report( netlist_str + wxT( "\n" ), RPT_SEVERITY_ERROR );
+            m_reporter->Report( wxString( netlist_str ) + wxT( "\n" ), RPT_SEVERITY_ERROR );
             checkParity = false;
         }
     }

qa/pcbnew_utils/board_test_utils.cpp

@@ -240,7 +240,7 @@ void LoadAndTestFootprintFile( const wxString& aLibRelativePath, const wxString&
          * when the cache is set up on future runs.
          */
         TEMPORARY_DIRECTORY tempLib( "kicad_qa_fp_roundtrip", ".pretty" );
-        const wxString      fpFilename = fp1->GetFPID().GetLibItemName() + ".kicad_mod";
+        const wxString      fpFilename = fp1->GetFPID().GetLibItemName() + wxString( ".kicad_mod" );
 
         BOOST_TEST_MESSAGE( "Resaving footprint: " << fpFilename << " in " << tempLib.GetPath() );