EXT-3302 invisible avatar w/ bling crashes mac viewers

not mac-specific. We were treating IMG_INVISIBLE as a baked texture when an avatar used
it as a bake. However, some baked textures have 5 channels, IMG_INVISIBLE
has 4. Asking KDU to decode the 5th channel of a 4 channel image resulted in a crash.

Fix skips the callback for loading morph masks from a bake if the bake image ID is
IMG_INVISIBLE.

Code reviewed by Seraph

--HG--
branch : avatar-pipeline

0 files changed, 0 insertions, 0 deletions