fix a warning

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-cpp/branches/activemq-cpp-3.4.x@1327694 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/activemq-cpp/src/main/decaf/util/concurrent/LinkedBlockingQueue.h b/activemq-cpp/src/main/decaf/util/concurrent/LinkedBlockingQueue.h
index 4d9a7e1..231c4e4 100644
--- a/activemq-cpp/src/main/decaf/util/concurrent/LinkedBlockingQueue.h
+++ b/activemq-cpp/src/main/decaf/util/concurrent/LinkedBlockingQueue.h
@@ -337,7 +337,7 @@
         }
 
         virtual E take() {
-            E value;
+            E value = E();
             int c = -1;
             synchronized(&this->takeLock) {