Fortran: Detect 'no implicit type' error in right place [PR103471]

2024-04-21  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/103471
	* resolve.cc (resolve_actual_arglist): Catch variables silently
	set as untyped, resetting the flag so that gfc_resolve_expr can
	generate the no implicit type error.
	(gfc_resolve_index_1): Block index expressions of unknown type
	from being converted to default integer, avoiding the fatal
	error in trans-decl.cc.
	* symbol.cc (gfc_set_default_type): Remove '(symbol)' from the
	'no IMPLICIT type' error message.
	* trans-decl.cc (gfc_get_symbol_decl): Change fatal error locus
	to that of the symbol declaration.
	(gfc_trans_deferred_vars): Remove two trailing tabs.

gcc/testsuite/
	PR fortran/103471
	* gfortran.dg/pr103471.f90: New test.