Bug in "git diff-files"

Hi,

I found a bug in git diff-files. git diff-files with a --diff-filter and --quiet given behaves bad. I have a diff-filter of U and one file M and one U. But diff-lib.c:105-107 in commit 1a9fe45 stops as soon as HAS_CHANGES is true. In my case it found the M file and stops searching as --quiet is given. But then when applying the diff-filter, this M instance is filtered out and thus 0 is returned instead of 1 which is returned with --exit-code and without --quiet.

Regards Björn Kautler