waccess: Fix up pass_waccess::check_alloc_size_call [PR102009]

waccess: Fix up pass_waccess::check_alloc_size_call [PR102009]

This function punts if the builtins have no arguments, but as can be seen
on the testcase, even if it has some arguments but alloc_size attribute's
arguments point to arguments that aren't passed, we get a warning earlier
from the FE but should punt rather than ICE on it.
Other users of alloc_size attribute e.g. in
tree-object-size.c (alloc_object_size) punt similarly and similarly
even in the same TU maybe_warn_nonstring_arg correctly verifies calls have
enough arguments.

2021-11-16  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/102009
	* gimple-ssa-warn-access.cc (pass_waccess::check_alloc_size_call):
	Punt if any of alloc_size arguments is out of bounds vs. number of
	call arguments.

	* gcc.dg/pr102009.c: New test.