Fixed read/use of uninitialized memory in RegexMatcher::MatchChunkAt().

Bug 5326905.
1. Andy reviewed this Android patch.
2. Ran through all tests under libcore/luni/src/test/java/org/apache/harmony/regex/tests/java/util/regex/
   wo new failures.

Change-Id: Ifa4c48b62a57b8ea19d332eefc99444ea1b6b910
1 file changed