* alloc.c (mark_object): Remove "#ifdef GC_CHECK_MARKED_OBJECTS"

wrapper that is not needed because the wrapped code is a no-op (zero
machine instructions) when GC_CHECK_MARKED_OBJECTS is not defined.
This avoids a -Wunused-macros diagnostic with GCC 4.7.1 x86-64.

src/ChangeLog

+2012-07-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* alloc.c (mark_object): Remove "#ifdef GC_CHECK_MARKED_OBJECTS"
+	wrapper that is not needed because the wrapped code is a no-op (zero
+	machine instructions) when GC_CHECK_MARKED_OBJECTS is not defined.
+	This avoids a -Wunused-macros diagnostic with GCC 4.7.1 x86-64.
+
 2012-07-02  Dmitry Antipov  <dmantipov@yandex.ru>
 
 	* alloc.c (mark_buffer): Simplify.  Remove prototype.

src/alloc.c

@@ -5924,10 +5924,8 @@ mark_object (Lisp_Object arg)
 	else
 	  pvectype = 0;
 
-#ifdef GC_CHECK_MARKED_OBJECTS
 	if (pvectype != PVEC_SUBR && pvectype != PVEC_BUFFER)
 	  CHECK_LIVE (live_vector_p);
-#endif /* GC_CHECK_MARKED_OBJECTS */
 
 	if (pvectype == PVEC_BUFFER)
 	  {