Fix change src/ports/SkImageDecoder_empty.cpp missed in 103033002

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/107123002

git-svn-id: http://skia.googlecode.com/svn/trunk@12519 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed