Inconsistent use of allocator wrapper macros in libiberty

Quite a few files in libiberty use XNEWVEC as a replacement for malloc(), but the they are being paired with plain free(); XDELVEC is not being used. Is there some reason for the inconsistency, such as some transitional issue, or should this be fixed?

Re: Inconsistent use of allocator wrapper macros in libiberty

> Is there some reason for the inconsistency, Not really. Patches welcome.