Merge branch 'master' (gcc-4.7, commit '3b6bebd') into gcc-4.6

Conflicts:
	source/s-unwrai.adb
	source/zcx/s-unrase.adb
	source/zcx/s-unwhan.adb
Merge branch 'master' (gcc-4.7, commit '02b8c8f') into gcc-4.6

Conflicts:
	source/s-unwrai.adb
	source/zcx/s-unrase.adb
	source/zcx/s-unwhan.ads

Modifications:
	source/s-unwrai.adb
	source/zcx/s-unrase.adb