fix for error report in property registration, it wasnt printing the error.

source/blender/python/intern/bpy_rna.c

@@ -6500,15 +6500,17 @@ static int deferred_register_prop(StructRNA *srna, PyObject *key, PyObject *item
 
 			py_ret = PyObject_Call(py_func, args_fake, py_kw);
 
-			Py_DECREF(args_fake); /* free's py_srna_cobject too */
-
 			if (py_ret) {
 				Py_DECREF(py_ret);
+				Py_DECREF(args_fake); /* free's py_srna_cobject too */
 			}
 			else {
+				/* _must_ print before decreffing args_fake */
 				PyErr_Print();
 				PyErr_Clear();
 
+				Py_DECREF(args_fake); /* free's py_srna_cobject too */
+
 				// PyC_LineSpit();
 				PyErr_Format(PyExc_ValueError,
 				             "bpy_struct \"%.200s\" registration error: "