re PR fortran/84073 (In -fc-prototypes fixed (nonzero) length strings are mapped to plain char in prototype.)

2017-01-29  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/84073
	* resolve.c (resolve_component): Ensure BIND(C) character
	components have length one.
	(resolve_symbol): Likewise for variables.

2017-01-29  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/84073
	* gfortran.dg/bind_c_usage_31.f90: New test.

From-SVN: r257138