free_graph: squash -Wunused-parameter warnings

diff --git a/cmd/tools/gmlparse.y b/cmd/tools/gmlparse.y
index 386f67b3f54681f1837d8442bcd62a5fef9230ea..33db302386b589f4a890155ed8752623b53dd3e9 100644 (file)
--- a/cmd/tools/gmlparse.y
+++ b/cmd/tools/gmlparse.y
@@ -67,6 +67,9 @@ free_edge (Dt_t*d, gmledge* p, Dtdisc_t* ds)
 static void
 free_graph (Dt_t*d, gmlgraph* p, Dtdisc_t* ds)
 {
+    (void)d;
+    (void)ds;
+
     if (!p) return;
     if (p->nodelist)
        dtclose (p->nodelist);