[PATCH] PR fortran/67939 -- Fix zero length strings in DATA statement

[FX]

> 2015-10-21  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
> 	PR fortran/67939
> 	* data.c (create_character_initializer): Deal with zero length string.
> 
> 2015-10-21  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
> 	PR fortran/67939
> 	* gfortran.dg/pr67939.f90: New test.

OK, thanks