minor change

Author: NimaSarajpoor

stumpy/stump.py

@@ -718,7 +718,7 @@ def stump(
     ignore_trivial = core.check_ignore_trivial(T_A, T_B, ignore_trivial)
     excl_zone = int(np.ceil(m / config.STUMPY_EXCL_ZONE_DENOM))
     if ignore_trivial:  # self-join
-        core.check_window_size(m, max_size=n_A, n=n_A)
+        core.check_window_size(m, max_size=min(n_A, n_B), n=n_A)
         diags = np.arange(excl_zone + 1, n_A - m + 1, dtype=np.int64)
     else:  # AB-join
         core.check_window_size(m, max_size=min(n_A, n_B))