srt: Factor out a goto statement

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Merge pull request #13 from dwbuiten/goto1

srt: Factor out a goto statement
Remove -D__STDC_FORMAT_MACROS from CXXFLAGS

The inttypes defines are no longer used anywhere due to that agi::Format
doesn't require them.
Make all of the syntax highlighter colors customizable

Closes #1782.
Update fontconfig
Update Chinese translations. Closes #1779.