Bugfix [#29125] Motion paths odd behaviour

* Made it impossible to try to calculate/create new motion paths lasting 0
frames (i.e. 250 to 250) since we cannot allocate a zero-length array for these.
Start frame can now be at most end-frame - 1, and end frame at least start frame
+ 1

* If an invalid configuration does occur, warnings/reports will now be issued in
response to this instead of silently failing (as per this bugreport).

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_anim.h b/source/blender/blenkernel/BKE_anim.h
index 44aebdf6205..c2b4e30ef3b 100644
--- a/source/blender/blenkernel/BKE_anim.h
+++ b/source/blender/blenkernel/BKE_anim.h
@@ -40,6 +40,7 @@ struct ListBase;
 struct bAnimVizSettings;
 struct bMotionPath;
 struct bPoseChannel;
+struct ReportList;
 
 /* ---------------------------------------------------- */
 /* Animation Visualisation */
@@ -49,7 +50,7 @@ void animviz_settings_init(struct bAnimVizSettings *avs);
 void animviz_free_motionpath_cache(struct bMotionPath *mpath);
 void animviz_free_motionpath(struct bMotionPath *mpath);
 
-struct bMotionPath *animviz_verify_motionpaths(struct Scene *scene, struct Object *ob, struct bPoseChannel *pchan);
+struct bMotionPath *animviz_verify_motionpaths(struct ReportList *reports, struct Scene *scene, struct Object *ob, struct bPoseChannel *pchan);
 
 void animviz_get_object_motionpaths(struct Object *ob, ListBase *targets);
 void animviz_calc_motionpaths(struct Scene *scene, ListBase *targets);