Get rid of a few unsigned/signed warnings

[Ulrich Drepper]

Andreas Jaeger wrote:

> 2002-12-28  Andreas Jaeger  <aj@suse.de>
> 
> 	* sysdeps/generic/readelflib.c (process_elf_file): Cast value to
> 	avoid warning.
> 	* sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Likewise.

I've applied the patch.  Thanks,

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