21e3b4483f
As part of #105779, the active status of UV maps won't be stored in CustomData anymore, so it has to be retrieved from a higher level. The best way to do that is to retrieve it once and pass around the BMesh custom data offset as a "key" to the data. This should also decrease function call overhead in this code (not that it was a bottleneck). Pull Request: https://projects.blender.org/blender/blender/pulls/105904