Avoid assert with no jobs present

kicad/dialogs/panel_jobs.cpp

@@ -195,12 +195,15 @@ public:
             i++;
         }
 
+        if( arrayStr.size() != 0 )
+        {
             m_listBoxOnly->InsertItems( arrayStr, 0 );
 
             for( int idx : selectedList )
             {
                 m_listBoxOnly->SetSelection( idx );
             }
+        }
 
         m_choiceArchiveformat->AppendString( _( "Zip" ) );
         m_choiceArchiveformat->SetSelection( 0 );