rb_catch now free from ANYARGS
rb_catch now free from ANYARGS

After 5e86b005c0f2ef30df2f9906c7e2f3abefe286a2, I now think ANYARGS is
dangerous and should be extinct.  This commit deletes ANYARGS from
rb_catch, and fixes some bugs revealed by that.

tenderlove/racc,tenderlove/racc,tenderlove/racc,tenderlove/racc,tenderlove/racc