add a return value to add_np_edges

Related to #1801.

diff --git a/lib/ortho/ortho.c b/lib/ortho/ortho.c
index b7bfe7d6dacf9794b77efdb959023b686b693b17..7e00216caa21771e3bf14785a8c3315042f73de7 100644 (file)
--- a/lib/ortho/ortho.c
+++ b/lib/ortho/ortho.c
@@ -765,7 +765,7 @@ add_edges_in_G(channel* cp)
     }
 }
 
-static void
+static int
 add_np_edges (Dt_t* chans)
 {
     Dt_t* lp;
@@ -781,6 +781,8 @@ add_np_edges (Dt_t* chans)
                add_edges_in_G(cp);
        }
     }
+
+    return 0;
 }
 
 static segment*