Have CodecTest's check not skip 'complete' tests

As currently written, some code paths trigger a return, which
inadvertently avoids the "let's run the same test again on full decodes"
at the bottom of the function.

Bug: skia:
Change-Id: I89a06ec6398099d2bfa3b0e81bb9077a28a7f096
Reviewed-on: https://skia-review.googlesource.com/144241
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
1 file changed