[dia] Fix for https://mail.gnome.org/archives/dia-list/2019-May/msg00004.html

[Zander <zbrown src gnome org>]

commit 24c914354f87c08e2653779e560cc3292b211c62
Author: Zander Brown <zbrown gnome org>
Date:   Fri May 10 16:07:15 2019 +0100

    Fix for https://mail.gnome.org/archives/dia-list/2019-May/msg00004.html

 app/diagram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/diagram.c b/app/diagram.c
index 7c8451fd..1bb43935 100644
--- a/app/diagram.c
+++ b/app/diagram.c
@@ -705,7 +705,7 @@ diagram_selected_break_external (Diagram *dia)
       con_point = obj->handles[i]->connected_to;
 
       if (con_point == NULL)
-        break; /* Not connected */
+        continue; /* Not connected */
 
       other_obj = con_point->object;
       if (g_list_find (dia->data->selected, other_obj) == NULL) {