Merge pull request #3173 from gavinandresen/fuzzmessages

-fuzzmessagestest=N : randomly corrupt 1-of-N sent messages

src/serialize.h

@@ -1091,8 +1091,8 @@ public:
     }
 
     void GetAndClear(CSerializeData &data) {
-        vch.swap(data);
-        CSerializeData().swap(vch);
+        data.insert(data.end(), begin(), end());
+        clear();
     }
 };