Rename iv_count on shapes to next_iv_index
iv_count
next_iv_index
iv_count is a misleading name because when IVs are unset, the new shape doesn't decrement this value. next_iv_count is an accurate, and more descriptive name.
next_iv_count
Rename
iv_count
on shapes tonext_iv_index
iv_count
is a misleading name because when IVs are unset, the newshape doesn't decrement this value.
next_iv_count
is an accurate, andmore descriptive name.