Fix a bug in memcmp -- don't terminate the compare on a NULL, keep comparing up to n bytes, till the are found to be either the same or differernt.
Fix a bug in memcmp -- don't terminate the compare on a NULL, keep
comparing up to n bytes, till the are found to be either the same or
differernt.

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc