Fix T94708: negative reference count error with Python API callbacks

Regression in 7972785d7b90771f50534fe3e1101d8adb615fa3 that caused
Python callback arguments to be de-referenced twice - potentially
accessing freed memory. Making a new-file with a circle-select
tool active triggered this (for example).

Now arguments aren't de-referenced when Blender it's self has already
removed the callback handle.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/include/ED_space_api.h b/source/blender/editors/include/ED_space_api.h
index f4a69737da1..fb76b36baef 100644
--- a/source/blender/editors/include/ED_space_api.h
+++ b/source/blender/editors/include/ED_space_api.h
@@ -86,7 +86,7 @@ void *ED_region_draw_cb_activate(struct ARegionType *art,
                                  int type);
 void ED_region_draw_cb_draw(const struct bContext *C, struct ARegion *region, int type);
 void ED_region_surface_draw_cb_draw(struct ARegionType *art, int type);
-void ED_region_draw_cb_exit(struct ARegionType *art, void *handle);
+bool ED_region_draw_cb_exit(struct ARegionType *art, void *handle);
 void ED_region_draw_cb_remove_by_type(struct ARegionType *art,
                                       void *draw_fn,
                                       void (*free)(void *));