rb_reg_enc_error marked as NORETURN

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61918 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

re.c

@@ -1346,6 +1346,7 @@ static VALUE
 rb_reg_preprocess(const char *p, const char *end, rb_encoding *enc,
         rb_encoding **fixed_enc, onig_errmsg_buffer err);
 
+NORETURN(static void reg_enc_error(VALUE re, VALUE str));
 
 static void
 reg_enc_error(VALUE re, VALUE str)