Don't show new and old filemode for added/removed files

It gives us no extra info whatsoever to show "----------" for either new
or old mode, it's just noise (especially since we now show the "old"
filemode for deleted files)

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-commit.c

@@ -46,8 +46,15 @@ void print_filepair(struct diff_filepair *pair)
 
 	html("<tr>");
 	htmlf("<td class='mode'>");
-	html_filemode(pair->two->mode);
-	if (pair->one->mode != pair->two->mode) {
+	if (is_null_sha1(pair->two->sha1)) {
+		html_filemode(pair->one->mode);
+	} else {
+		html_filemode(pair->two->mode);
+	}
+
+	if (pair->one->mode != pair->two->mode && 
+	    !is_null_sha1(pair->one->sha1) && 
+	    !is_null_sha1(pair->two->sha1)) {
 		html("<span class='modechange'>[");
 		html_filemode(pair->one->mode);
 		html("]</span>");