capture diff output and then g_print it instead of letting diff print to stdout
capture diff output and then g_print it instead of letting diff print to stdout

This allows better control about what g_print does.

freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec,mltframework/swfdec