X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib-python/blobdiff_plain/704500e11c6a7e240acc047607d34bc6db520f15..1db32dec968f0985a597c6d810fd4cd6a9bfaad8:/assoc.pyx

diff --git a/assoc.pyx b/assoc.pyx
index 38b8446..7685dd6 100644
--- a/assoc.pyx
+++ b/assoc.pyx
@@ -73,7 +73,7 @@ cdef class AssocTable (Mapping):
 cdef class _AssocIter (_MapIterator):
   cdef AssocTable t
   cdef assoc_iter i
-  def __cinit__(me, AssocTable t):
+  def __cinit__(me, AssocTable t not None):
     me.t = t
     assoc_mkiter(&me.i, &me.t._t)
   cdef void *_next(me):