THRIFT-916 compile with -Wall -Wextra without warning on Debian Lenny


git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1036250 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/test/TransportTest.cpp b/lib/cpp/test/TransportTest.cpp
index 46a89a7..d12e384 100644
--- a/lib/cpp/test/TransportTest.cpp
+++ b/lib/cpp/test/TransportTest.cpp
@@ -341,6 +341,7 @@
 void set_alarm();
 
 void alarm_handler(int signum) {
+  (void) signum;
   // The alarm timed out, which almost certainly means we're stuck
   // on a transport that is incorrectly blocked.
   ++numTriggersFired;