use SWAP macro

Apply the semantic patch swap.cocci to convert hand-rolled swaps to use
the macro SWAP.  The resulting code is shorter and easier to read, the
object code is effectively unchanged.

The patch for object.c had to be hand-edited in order to preserve the
comment before the change; Coccinelle tried to eat it for some reason.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/diff-no-index.c b/diff-no-index.c
index f420786039..1ae09894d7 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -186,9 +186,8 @@ static int queue_diff(struct diff_options *o,
 
 		if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
 			unsigned tmp;
-			const char *tmp_c;
 			tmp = mode1; mode1 = mode2; mode2 = tmp;
-			tmp_c = name1; name1 = name2; name2 = tmp_c;
+			SWAP(name1, name2);
 		}
 
 		d1 = noindex_filespec(name1, mode1);