re PR c/40172 (Revision 147596 breaks bootstrap)

2009-05-19  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c/40172
gcc/
	* c.opt (Wlogical-op): Disabled by default.
	* c-opt (c_common_post_options): Do not enable Wlogical-op with
	Wextra.
	* doc/invoke.texi (Wlogical-op): Likewise.
testsuite/
	* gcc.dg/pr40172.c: Add -Wlogical-op to dg-options.

From-SVN: r147717