Test procedure dummy arguments against global symbols, if available.

Test procedure dummy arguments against global symbols, if available.

this fixes a rather old PR from 2005, where a subroutine
could be passed and called as a function.  This patch checks
for that, also for the reverse, and for wrong types of functions.

I expect that this will find a few bugs in dusty deck code...

gcc/fortran/ChangeLog:

	PR fortran/24878
	* interface.cc (compare_parameter): Check global subroutines
	passed as actual arguments for subroutine / function and
	function type.

gcc/testsuite/ChangeLog:

	PR fortran/24878
	* gfortran.dg/interface_51.f90: New test.