Profinet check of changed gsdml file removed in runtime again

profibus/lib/rt/src/rt_pn_gsdml_data.cpp

@@ -383,6 +383,7 @@ int GsdmlDataReader::tag_attribute( const char *name, const char *value)
   switch ( current_tag) {
   case gsdmldata_eTag_PnDevice:
     if ( strcmp( name, "GsdmlFile") == 0) {
+      if ( strcmp( data->gsdmlfile, "") != 0) {
 	// Check that the GSDML file is not changed
 	char *gsdmlfile_p;
   
@@ -395,6 +396,7 @@ int GsdmlDataReader::tag_attribute( const char *name, const char *value)
 	if ( strcmp( value, gsdmlfile_p) != 0)
 	  return PB__GSDMLFILEMISMATCH;
       }
+    }
     else if ( strcmp( name, "DeviceText") == 0)
       strncpy( data->device_text, value, sizeof(data->device_text));
     else if ( strcmp( name, "DeviceNumber") == 0)