Python3 PyObject_CallMethodObjArgs method name should be str not bytes

Author: matusvalo

Modules/_librabbitmq/connection.c

@@ -1236,7 +1236,7 @@ PyRabbitMQ_ApplyCallback(PyRabbitMQ_Connection *self,
         goto error;
 
     /* message = self.Message(channel, properties, delivery_info, body) */
-    Message = PyBytes_FromString("Message");
+    Message = BUILD_METHOD_NAME("Message");
     message = PyObject_CallMethodObjArgs((PyObject *)self, Message,
                 channelobj, propdict, delivery_info, view, NULL);
     if (!message)

Modules/_librabbitmq/connection.h

@@ -16,13 +16,15 @@
 
 
 #if PY_VERSION_HEX >= 0x03000000 /* 3.0 and up */
+#  define BUILD_METHOD_NAME PyUnicode_FromString
 #  define FROM_FORMAT PyUnicode_FromFormat
 #  define PyInt_FromLong PyLong_FromLong
 #  define PyInt_AS_LONG PyLong_AsLong
 #  define PyInt_Check PyLong_Check
 #  define PyInt_FromSsize_t PyLong_FromSsize_t
 #  define PyString_INTERN_FROM_STRING PyString_FromString
 #else                            /* 2.x */
+#  define BUILD_METHOD_NAME PyBytes_FromString
 #  define FROM_FORMAT PyString_FromFormat
 #  define PyString_INTERN_FROM_STRING PyString_InternFromString
 #endif