the check for error correction being disabled was overriding the data
length checks. this avoids returning incorrect information (width /
height) for the decoded frame which could result in inconsistent sizes
returned in to an application causing it to read beyond the bounds of
the frame allocation.

BUG=webm:1443
BUG=b/62458770

Change-Id: I063459674e01b57c0990cb29372e0eb9a1fbf342