png: improve signature check
authorVittorio Giovara <vittorio.giovara@gmail.com>
Mon, 12 Jan 2015 22:55:45 +0000 (23:55 +0100)
committerVittorio Giovara <vittorio.giovara@gmail.com>
Wed, 14 Jan 2015 16:10:19 +0000 (17:10 +0100)
commit1e763454322f7fbc7799f6009bf2e11d7a3b9821
tree0fd624144b38b513aaf7bd18261b1cf5360dee1c
parent456ffec35d55288d589aa1901919e038c3427f30
png: improve signature check

Return proper error code, print an error message and add missing
parentheses.
libavcodec/pngdec.c