10805 Fix for 10687 can be improved

@@ -35,11 +35,11 @@
 
 #if defined(DEBUG)
 #define PCIEB_DEBUG pcieb_dbg
 extern void pcieb_dbg(uint_t bit, dev_info_t *dip, char *fmt, ...);
 #else /* DEBUG */
-#define PCIEB_DEBUG(...)
+#define PCIEB_DEBUG(...) (void)(0)
 #endif /* DEBUG */
 
 typedef enum {  /* same sequence as pcieb_debug_sym[] */
         /*  0 */ DBG_ATTACH,
         /*  1 */ DBG_PWR,