SkFILEStream::Make: fix leak.

Change-Id: I218ae89f049df3d05380b46ca672bb1f6fcb5ea4
Reviewed-on: https://skia-review.googlesource.com/38962
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed