Fix T79712: Color Changes do not record in Auto-Key Mode

Caused by rBfffba2b6530.

In above commit, the buttons rnaindex [-1 for entire arrays like colors]
was not used anymore for the entire function body of
`ED_autokeyframe_property` (previously in `ui_but_anim_autokey`).
Replacing the index with 0 (in the array case) is indeed necessary for
`BKE_fcurve_find_by_rna_context_ui`, prior to rBfffba2b6530 this was
taken care of by using `ui_but_get_fcurve` instead [which did this
internally].

But using an index of 0 (instead of -1) for the entire function body of
`ED_autokeyframe_property` fails for the array part later, namely
`insert_keyframe` needs -1 here.
Now just replace the index for //finding the FCurve//, but use the
original for //inserting the keyframe//.

Could be backported to 2.83 LTS.

Reviewers: campbellbarton, sybren

Subscribers:

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/editors/interface/interface_anim.c b/source/blender/editors/interface/interface_anim.c
index 8d12a1dd1ad..d2f97eabc80 100644
--- a/source/blender/editors/interface/interface_anim.c
+++ b/source/blender/editors/interface/interface_anim.c
@@ -306,8 +306,7 @@ bool ui_but_anim_expression_create(uiBut *but, const char *str)
 
 void ui_but_anim_autokey(bContext *C, uiBut *but, Scene *scene, float cfra)
 {
-  const int rnaindex = (but->rnaindex == -1) ? 0 : but->rnaindex;
-  ED_autokeyframe_property(C, scene, &but->rnapoin, but->rnaprop, rnaindex, cfra);
+  ED_autokeyframe_property(C, scene, &but->rnapoin, but->rnaprop, but->rnaindex, cfra);
 }
 
 void ui_but_anim_copy_driver(bContext *C)