THRIFT: Nonblcoking bug fix

calling decrement with -1 even though param is an integer. Just made it clean by adding a decrement function

reviewed by: mcslee
revertable
test plan: ran on a test server


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665669 13f79535-47bb-0310-9956-ffa450edef68
1 file changed