git-gui: Don't try to tag the 'Binary files * and * differ' line.

Signed-off-by: NShawn O. Pearce <spearce@spearce.org>

git-gui.sh

@@ -734,6 +734,7 @@ proc read_diff {fd} {
 			|| [string match {mode *} $line]
 			|| [string match {new file *} $line]
 			|| [string match {deleted file *} $line]
+			|| [string match {Binary files * and * differ} $line]
 			|| $line eq {\ No newline at end of file}
 			|| [regexp {^\* Unmerged path } $line]} {
 			set tags {}