[PATCHv2 6/6] diff: use HAS_MULTI_BITS instead of counting bits manually

[Stefan Beller <sbeller@google.com>]

This aligns the style to the previous patch.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 diff.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/diff.c b/diff.c
index 42858d4c7d..c2ee81a1fa 100644
--- a/diff.c
+++ b/diff.c
@@ -4107,20 +4107,15 @@ void diff_setup(struct diff_options *options)
 
 void diff_setup_done(struct diff_options *options)
 {
-	int count = 0;
+	unsigned check_mask = DIFF_FORMAT_NAME |
+			      DIFF_FORMAT_NAME_STATUS |
+			      DIFF_FORMAT_CHECKDIFF |
+			      DIFF_FORMAT_NO_OUTPUT;
 
 	if (options->set_default)
 		options->set_default(options);
 
-	if (options->output_format & DIFF_FORMAT_NAME)
-		count++;
-	if (options->output_format & DIFF_FORMAT_NAME_STATUS)
-		count++;
-	if (options->output_format & DIFF_FORMAT_CHECKDIFF)
-		count++;
-	if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
-		count++;
-	if (count > 1)
+	if (HAS_MULTI_BITS(options->output_format & check_mask))
 		die(_("--name-only, --name-status, --check and -s are mutually exclusive"));
 
 	if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK))
-- 
2.16.0.rc0.223.g4a4ac83678-goog