Fix a bug in the recursion depth check in store_lhash().

The recursion depth check was not being cleaned up correctly, causing an
assertion failure in testing. This suggests that this routine likely wasn't
well tested.

dist/Storable/Storable.xs

@@ -3178,7 +3178,7 @@ static int store_lhash(pTHX_ stcxt_t *cxt, HV *hv, unsigned char hash_flags)
             entry = HeNEXT(entry);
         }
     }
-    if (recur_sv == (SV*)hv && cxt->max_recur_depth_hash != -1 && cxt->recur_depth > 0) {
+    if (recur_sv != (SV*)hv && cxt->max_recur_depth_hash != -1 && cxt->recur_depth > 0) {
         TRACEME(("recur_depth --%" IVdf, cxt->recur_depth));
         --cxt->recur_depth;
     }