totemconfig.c: avoid another warning

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1933 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/totemconfig.c

@@ -584,7 +584,7 @@ parse_error:
 }
 
 static int read_keyfile (
-	char *key_location,
+	const char *key_location,
 	struct totem_config *totem_config,
 	const char **error_string)
 {