fixed reference counting bug in rpc and signal handlers

plugins/python/uwsgi_pymodule.c

@@ -394,6 +394,7 @@ PyObject *py_uwsgi_register_rpc(PyObject * self, PyObject * args) {
 		return NULL;
 	}
 
+	Py_INCREF(func);
 
 	if (uwsgi_register_rpc(name, &python_plugin, argc, func)) {
 		return PyErr_Format(PyExc_ValueError, "unable to register rpc function");
@@ -498,6 +499,8 @@ PyObject *py_uwsgi_register_signal(PyObject * self, PyObject * args) {
 		return NULL;
 	}
 
+	Py_INCREF(handler);
+
 	if (uwsgi_register_signal(uwsgi_signal, signal_kind, handler, 0)) {
 		return PyErr_Format(PyExc_ValueError, "unable to register signal");
 	}