Fortran: Check PDT parameters are of integer type [PR84432, PR114815]

Fortran: Check PDT parameters are of integer type [PR84432, PR114815]

2025-09-04  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/84432
	PR fortran/114815
	* expr.cc (gfc_check_assign_symbol): Check that components in a
	PDT with a default initializer have type and length parameters
	that reduce to constant integer expressions.
	* trans-expr.cc (gfc_trans_assignment_1): Parameterized
	components cannot have default initializers so they must be
	allocated after initialization.

gcc/testsuite/
	PR fortran/84432
	PR fortran/114815
	* gfortran.dg/pdt_26.f03: Update with default no initializer.
	* gfortran.dg/pdt_27.f03: Change to test non-conforming
	initializers.