libgimp: only save metadata after all settings have been updated.

Saving metadata was added inside the loop where the flags for
the differen types of metadata etc. to be saved were updated.
This caused multiple calls to save metadata with inconsistent
settings.

libgimp/gimpprocedureconfig.c

@@ -867,13 +867,13 @@ gimp_procedure_config_save_metadata (GimpProcedureConfig *config,
               else
                 config->priv->metadata_flags &= ~prop_flag;
             }
+        }
 
       gimp_image_metadata_save_finish (exported_image,
                                        config->priv->mime_type,
                                        config->priv->metadata,
                                        config->priv->metadata_flags,
                                        file, NULL);
-        }
 
       config->priv->metadata_saved = TRUE;
     }