Detect if StoreFrame read more than anmf_payload_size bytes
Detect if StoreFrame read more than anmf_payload_size bytes

After ParseAnimationFrame() calls StoreFrame(), check if StoreFrame() reads
more than anmf_payload_size bytes from dmux->mem_. Treat that as PARSE_ERROR.

Change-Id: I0d03885c19d32792af78de7bed1a944ca01f1dc6

webmproject/libwebp,webmproject/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp