[automerger skipped] Fix potential overflow when calculating ImageSize am: a6ede43ad8 am: c04bf64701 am: 433674c153 am: 2e9c0940d4 am: 14380b914c am: f9c3429d5c am: 76e034bd7a am: 313c4666eb -s ours

am skip reason: Merged-In I2d7d278f2f2926463513c2abe3a73c012b928225 with SHA-1 2181204216 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/giflib/+/29467134

Change-Id: Ic405b17c32bcf1351e23e1daf82767806aeacd88
Signed-off-by: Automerger Merge Worker <[email protected]>