Fixed memory leak on failure.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 4cfd9f8..ad37366 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -298,7 +298,7 @@
 
     size = va.len + vb.len;
     if (size < 0) {
-            return PyErr_NoMemory();
+            PyErr_NoMemory();
             goto done;
     }