Fortran: avoid NULL pointer dereference on invalid range in logical SELECT CASE

gcc/fortran/ChangeLog:

	PR fortran/103286
	* resolve.c (resolve_select): Choose appropriate range limit to
	avoid NULL pointer dereference when generating error message.

gcc/testsuite/ChangeLog:

	PR fortran/103286
	* gfortran.dg/pr103286.f90: New test.