force_directed_edge_bundling: suppress -Wunused-parameter warning

diff --git a/lib/mingle/edge_bundling.c b/lib/mingle/edge_bundling.c
index 7f6016b432210354ad66d1da09802f6ab2c65ac0..9ce5536eb5dcdb188ccdebd3931c46d64fffcf38 100644 (file)
--- a/lib/mingle/edge_bundling.c
+++ b/lib/mingle/edge_bundling.c
@@ -570,6 +570,8 @@ static pedge* force_directed_edge_bundling(SparseMatrix A, pedge* edges, int max
       edges_global = edges;
       drawScene();
     }
+#else
+    (void)open_gl;
 #endif
 
   }