PR c/4389

	PR c/4389
	* tree.c (host_integerp): Ensure that the constant integer is
	representable in a HOST_WIDE_INT or an unsigned HOST_WIDE_INT
	when pos is zero or non-zero respectively.  Clarify comment.
	* c-format.c (check_format_info_recurse): Fix host_integerp
	usage; the pos argument should be zero when assigning to a
	signed HOST_WIDE_INT.

	* gcc.dg/20020219-1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49914 138bc75d-0d04-0410-961f-82ee72b054a4