* eval.c (evaluate_subexp): Ask lookup_struct_elt_type to call

	* eval.c (evaluate_subexp):  Ask lookup_struct_elt_type to call
	error if it fails to find a member type, rather than return NULL
	and trigger a coredump.
	* symtab.c (lookup_symbol, lookup_demangled_block_symbol,
	lookup_demangled_partial_symbol,):  Ask demangle_and_match to
	match on complete demanglings, including argument lists for member
	functions, rather than just accepting the first demangling that
	matches the class and function name.