* include/bits/uses_allocator.h (__uses_allocator_helper): Simplify.
	(__uses_allocator_arg): Remove unused type.
	(__uses_alloc0): Turn into a trivial type.
	(__uses_alloc): Add missing template parameter in primary template.
	(__uses_alloc_impl): Rename to __uses_alloc_t.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211121 138bc75d-0d04-0410-961f-82ee72b054a4