middle-end/110176 - wrong zext (bool) <= (int) 4294967295u folding

middle-end/110176 - wrong zext (bool) <= (int) 4294967295u folding

The following fixes a wrong pattern that didn't match the behavior
of the original fold_widened_comparison in that get_unwidened
returned a constant always in the wider type.  But here we're
using (int) 4294967295u without the conversion applied.  Fixed
by doing as earlier in the pattern - matching constants only
if the conversion was actually applied.

	PR middle-end/110176
	* match.pd (zext (bool) <= (int) 4294967295u): Make sure
	to match INTEGER_CST only without outstanding conversion.

	* gcc.dg/torture/pr110176.c: New testcase.

(cherry picked from commit 22dbfbe8767ff4c1d93e39f68ec7c2d5b1358beb)