Add a missing decref.
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index a6d1611..132d4cc 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -36,6 +36,7 @@
 		    (last < (-1 - PyInt_GetMax() - step))) {
 			PyErr_SetString(PyExc_OverflowError,
 					"integer addition");
+			Py_DECREF(obj);
 			return NULL;
 		}			
 	}