.:	* vec.c (vec_p_reserve, vec_o_reserve): Allocation is signed.
	* vec.h (VEC_alloc, VEC_embedded_size, VEC_embedded_init):
	Allocation is signed.
	(VEC_reserve): Return flag, allocation is signed.
cp:
	* name-lookup.c (push_binding): Use VEC_reserve.

From-SVN: r84281