diff -r 479209198de3 -r 5cee4cb5ad79 ui/gtk/tree.c
--- a/ui/gtk/tree.c	Wed Nov 22 08:47:52 2017 +0100
+++ b/ui/gtk/tree.c	Wed Nov 22 09:49:26 2017 +0100
@@ -258,6 +258,7 @@
                 event);
     }
     // TODO: destroy callback
+
     
     GtkTreeSelection *selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(view));
     gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);
@@ -335,6 +336,7 @@
 
 void ui_table_dragsource(UIWIDGET tablewidget, int actions, char *target0, ...) { 
     va_list ap;
+    va_start(ap, target0);
     int nelm;
     char **targets = targets2array(target0, ap, &nelm);
     va_end(ap);
@@ -355,6 +357,7 @@
 
 void ui_table_dragdest(UIWIDGET tablewidget, int actions, char *target0, ...) {
     va_list ap;
+    va_start(ap, target0);
     int nelm;
     char **targets = targets2array(target0, ap, &nelm);
     va_end(ap);