re PR c++/23624 (ICE: internal compiler error: in invert_truthvalue, at fold-const.c:2697)

2005-09-09  Richard Guenther  <rguenther@suse.de>

	PR c++/23624
	* fold-const.c (fold_ternary): Check truth_value_p before
	calling invert_truthvalue.

	* g++.dg/tree-ssa/pr23624.C: New testcase.

From-SVN: r104083