Merge to XFA: Fix a leak in PDF_DataDecode() on failure.

Found using the test examples from https://crbug.com/537780

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1376413003 .

(cherry picked from commit 63d0a52a6af7d327fdb5792f520cc8d93fe2f1bb)

Review URL: https://codereview.chromium.org/1378303006 .
1 file changed