convert.c (convert_to_integer): Use fold_convert instead of fold_build1 (NOP_EXPR...

convert.c (convert_to_integer): Use fold_convert instead of fold_build1 (NOP_EXPR, ...).

2005-12-02  Richard Guenther  <rguenther@suse.de>

	* convert.c (convert_to_integer): Use fold_convert instead
	of fold_build1 (NOP_EXPR, ...).  Use tree_int_cst_sgn < 0
	instead of comparing against 0.  Use build_int_cst instead
	of converting integer_zero_node.

From-SVN: r107881