* ali-util.adb (Initialize_Checksum): Use out-mode instead of in out.

	* ali-util.adb (Initialize_Checksum): Use out-mode instead of in out.
	Found due to GCC 3.0 warning of using uninitialized value.

	* layout.adb:
	(Get_Max_Size): Use variant record for tracking value/expression.
	 Makes logic clearer and prevents warnings for uninitialized variables.
	(Layout_Array_Type): Use variant record for tracking value/expression.
	 Makes logic clearer and prevents warnings for uninitialized variables.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46652 138bc75d-0d04-0410-961f-82ee72b054a4