[PATCH] PR fortran/66725 -- Fix multiple ICEs

[FX]

> 2015-07-03  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
> 	* io.c (is_char_type): New function to test for BT_CHARACTER
> 	(gfc_match_open, gfc_match_close, match_dt_element): Use it.
> 
> 2015-07-03  Steven G. Kargl  <kargl@gcc.gnu.org>
> 	* gfortran.dg/pr66725.f90: New test.

OK to commit. Thanks!

FX