ipcpd: normal: Fix segfault in dijkstra calculation

This fixes a dumb segfault in the dijkstra calculation. If an entry
can be removed from the table it was set to NULL. However, if the
table is completely empty, the index was -1, resulting in an illegal
access into the table.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/ipcpd/normal/graph.c b/src/ipcpd/normal/graph.c
index 2ae36918..ed545b8c 100644
--- a/src/ipcpd/normal/graph.c
+++ b/src/ipcpd/normal/graph.c
@@ -340,7 +340,8 @@ static int get_min_vertex(struct vertex ** vertices,
                 }
         }
 
-        vertices[index] = NULL;
+        if (index != -1)
+                vertices[index] = NULL;
 
         return index;
 }