python/graph: don't crash colourer on bad link

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/python/samba/graph.py b/python/samba/graph.py
index 17626e0a3619c0e51bd6f73f7c9013505f779a25..0c389a74e3ad856df4cec6a6d37d44093fd2ca24 100644 (file)
--- a/python/samba/graph.py
+++ b/python/samba/graph.py
@@ -517,6 +517,8 @@ def get_transitive_colourer(colours, n_vertices):
         n = 1 + int(n_vertices ** 0.5)
 
         def f(link):
+            if not isinstance(link, int):
+                return ''
             return scale[min(link * m // n, m - 1)]
 
     else: