cmd_push: set "atomic" bit directly

This makes the code shorter and more obvious by removing an
unnecessary interim variable.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/push.c

@@ -486,7 +486,6 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 	int flags = 0;
 	int tags = 0;
 	int rc;
-	int atomic = 0;
 	const char *repo = NULL;	/* default repository */
 	struct option options[] = {
 		OPT__VERBOSITY(&verbosity),
@@ -518,7 +517,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
 			TRANSPORT_PUSH_FOLLOW_TAGS),
 		OPT_BIT(0, "signed", &flags, N_("GPG sign the push"), TRANSPORT_PUSH_CERT),
-		OPT_BOOL(0, "atomic", &atomic, N_("request atomic transaction on remote side")),
+		OPT_BIT(0, "atomic", &flags, N_("request atomic transaction on remote side"), TRANSPORT_PUSH_ATOMIC),
 		OPT_END()
 	};
 
@@ -534,9 +533,6 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 	if (tags)
 		add_refspec("refs/tags/*");
 
-	if (atomic)
-		flags |= TRANSPORT_PUSH_ATOMIC;
-
 	if (argc > 0) {
 		repo = argv[0];
 		set_refspecs(argv + 1, argc - 1, repo);