Some patches for new clock functions

[Ulrich Drepper]

Andreas Jaeger <aj@oss.sgi.com> writes:

> I got some warnings when compiling and fixed them:
> - Fixed some typos
> - We weren't always setting retval
> - memmem needs <string.h>

I checked the patch in but with a few changes.  The reason the return
value was undefined was that I wanted to initialize the variable at
the beginning.  I somehow managed to forget to make this change.

Thanks,

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