ada-tree.h (DECL_PARM_ALT): Now DECL_PARM_ALT_TYPE.

ada-tree.h (DECL_PARM_ALT): Now DECL_PARM_ALT_TYPE.

	* gcc-interface/ada-tree.h (DECL_PARM_ALT): Now DECL_PARM_ALT_TYPE.
	* gcc-interface/decl.c (gnat_to_gnu_param): Fix formatting, simplify
	and adjust for above renaming.
	* gcc-interface/utils.c (convert_vms_descriptor): Likewise. Add new
	gnu_expr_alt_type parameter.  Convert the expression to it instead
	of changing its type in place.
	(build_function_stub): Adjust call to above function.

From-SVN: r138518