Skip unchanged value validation in CV_SetCVar if there is a can_change callback
Merged
requested to merge skip-same-cvar-value-validation-if-can-change-callback-is-present into next
Fixes #1312 (closed) by just letting the cvar change go through if it has a can_change callback. The validation for skin/skin2 was moved to Skin_CanChange/Skin2_CanChange instead.