do not delete function declarations in case of non-sanitizing builds

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

internal.h

@@ -69,7 +69,7 @@ extern "C" {
 #endif
 
 #ifndef NO_SANITIZE
-#define NO_SANITIZE(x, y)
+#define NO_SANITIZE(x, y) y
 #endif
 
 #ifdef HAVE_VALGRIND_MEMCHECK_H