THRIFT-1187. rb: nonblocking_server shutdown race under Ruby 1.9

This patch fixes a shutdown error that occurs under ruby 1.9.2

Patch: Ilya Maykov

git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1130242 13f79535-47bb-0310-9956-ffa450edef68
1 file changed