re PR bootstrap/53912 (bootstrap fails using default c++ mode in stage 2 and 3…

re PR bootstrap/53912 (bootstrap fails using default c++ mode in stage 2 and 3 for native x86_64-w64-mingw32)

	PR target/53912
	* prefix.c (lookup_key): Replace xmalloc/xrealloc
	use by XNEWVEC/XRESIZEVEC.

From-SVN: r193946

gcc/ChangeLog

+2012-11-29 Kai Tietz  <ktietz@redhat.com>
+
+	PR target/53912
+	* prefix.c (lookup_key): Replace xmalloc/xrealloc
+	use by XNEWVEC/XRESIZEVEC.
+
 2012-11-29  Richard Earnshaw  <rearnsha@arm.com>
 
 	PR target/55073

gcc/prefix.c

@@ -157,12 +157,12 @@ lookup_key (char *key)
     }
 
   size = 32;
-  dst = xmalloc (size);
+  dst = XNEWVEC (char, size);
 
   res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
   if (res == ERROR_MORE_DATA && type == REG_SZ)
     {
-      dst = xrealloc (dst, size);
+      dst = XRESIZEVEC (char, dst, size);
       res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
     }