THRIFT-587. cpp: Properly set addrLen before accept calls

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@816850 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/server/TNonblockingServer.cpp b/lib/cpp/src/server/TNonblockingServer.cpp
index 45f635c..32f021a 100644
--- a/lib/cpp/src/server/TNonblockingServer.cpp
+++ b/lib/cpp/src/server/TNonblockingServer.cpp
@@ -591,6 +591,9 @@
 
     // Put this client connection into the proper state
     clientConnection->transition();
+
+    // addrLen is written by the accept() call, so needs to be set before the next call.
+    addrLen = sizeof(addr);
   }
 
   // Done looping accept, now we have to make sure the error is due to