Merge pull request #579 from Teebonne/patch-1

Rebuild with string argument, like the constructor

zmq.hpp

@@ -539,6 +539,11 @@ class message_t
         memcpy(data(), data_, size_);
     }
     
+    void rebuild(const std::string &str)
+    {
+        rebuild(str.data(), str.size());
+    }
+
     void rebuild(void *data_, size_t size_, free_fn *ffn_, void *hint_ = ZMQ_NULLPTR)
     {
         int rc = zmq_msg_close(&msg);