Handle color bounds correctly in GIF decode. am: 0ada9456d0 am: ec73b0bbc7 am: a7d4e89c4b am: 2fc0b7cc6c am: df56c4e613 am: 8b79a54199 am: d0eb7d1d99 am: 2889101573
am: 4d394a5d94

Change-Id: Ie2bb7b07c11fb27e29e815a6fc4204bafab67e53