Fix return check in CFX_FolderFontInfo::ScanFile() fread.

If you want to check the number of bytes read, you need to
change the order of arguments.

TEST=testing/corpus/fx/mulobj/1/1_10_watermark.pdf.0.png
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1262453006 .
1 file changed