swrap: Protect the FALL_THROUGH define

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

diff --git a/src/socket_wrapper.c b/src/socket_wrapper.c
index 46fb683dca213ebf4104c1c77591ad57e67e02e5..280215e49c543a88eb2cdaf8c2d2ecfa8c7d645a 100644 (file)
--- a/src/socket_wrapper.c
+++ b/src/socket_wrapper.c
@@ -107,11 +107,13 @@ enum swrap_dbglvl_e {
 #define DESTRUCTOR_ATTRIBUTE
 #endif
 
-#ifdef HAVE_FALLTHROUGH_ATTRIBUTE
-#define FALL_THROUGH __attribute__ ((fallthrough))
-#else
-#define FALL_THROUGH
-#endif
+#ifndef FALL_THROUGH
+# ifdef HAVE_FALLTHROUGH_ATTRIBUTE
+#  define FALL_THROUGH __attribute__ ((fallthrough))
+# else /* HAVE_FALLTHROUGH_ATTRIBUTE */
+#  define FALL_THROUGH
+# endif /* HAVE_FALLTHROUGH_ATTRIBUTE */
+#endif /* FALL_THROUGH */
 
 #ifdef HAVE_ADDRESS_SANITIZER_ATTRIBUTE
 #define DO_NOT_SANITIZE_ADDRESS_ATTRIBUTE __attribute__((no_sanitize_address))