Fixes (un)signed comparison warning in regex.c am: a9677b666c
am: 9ba0af9eae

* commit '9ba0af9eaef8742b5fec684d4faa7c398b100485':
  Fixes (un)signed comparison warning in regex.c

Change-Id: I8204ae2a9086f74865d22dc1c7c482e13f492eaa