Make CopyGraph safe against NULL argument.

Otherwise memcpy will fail.
2019-09-08 09:35:55 +02:00 · 2019-09-08 09:35:55 +02:00 · ec6d676920
parent aa726c9864
commit ec6d676920
1 changed files with 3 additions and 0 deletions
--- a/src/frontend/plotting/graphdb.c
+++ b/src/frontend/plotting/graphdb.c
@ -109,6 +109,9 @@ CopyGraph(GRAPH *graph)
    struct _keyed *k;
    struct dveclist *link, *newlink;

+    if (!graph)
+        return NULL;
+
    ret = NewGraph();
    memcpy(ret, graph, sizeof(GRAPH)); /* va: compatible pointer types */