ext/tk/tkutil/tkutil.c: disable untyped data warnings

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48252 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/tkutil/tkutil.c

@@ -23,6 +23,9 @@ static int rb_thread_critical; /* dummy */
 #include "st.h"
 #endif
 
+#undef RUBY_UNTYPED_DATA_WARNING
+#define RUBY_UNTYPED_DATA_WARNING 0
+
 #if !defined(RHASH_TBL)
 #define RHASH_TBL(h) (RHASH(h)->tbl)
 #endif