AVRO-934. PHP: Remove quadratic performance bug.  Contributed by abawany.
AVRO-934. PHP: Remove quadratic performance bug.  Contributed by abawany.

git-svn-id: c07a28b12301a3ecdaa1125838bb8d44496e7ec7@1185376 13f79535-47bb-0310-9956-ffa450edef68

wikimedia/avro-php