* Added a User-Pref option for the "XYZ to RGB" colour-mode setting for new F-Curves to compliment the one used for Keying Sets. With this option enabled, the builtin Keying Sets also can obey this option.
* Made all places that were previously manually checking the flags for keyframing to use a standard API function to do this now.
* Fixed bug introduced earlier today in commit 25353 by reverting the changes to keyingsets.c. Forgot that delete_keyframe doesn't handle do the "entire array" hack with array_index = -1
* Fixed bug with the insert-keyframe code for the array_index = -1 case, where too many channels were being keyed (i.e. an imaginary channel was often keyed in addition to the valid ones)
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