[dia] Fix build error related to DiaContext *_save()

[Hans Breuer <hans src gnome org>]

commit 0f433c04540cba2e62129fa54d9faa1fb0ac8b59
Author: Hans Breuer <hans breuer org>
Date:   Sun Jan 19 14:11:25 2014 +0100

    Fix build error related to DiaContext *_save()

 objects/custom_lines/custom_linetypes.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/objects/custom_lines/custom_linetypes.c b/objects/custom_lines/custom_linetypes.c
index 888d8cd..480c8e7 100644
--- a/objects/custom_lines/custom_linetypes.c
+++ b/objects/custom_lines/custom_linetypes.c
@@ -52,7 +52,7 @@ static DiaObject *custom_zigzagline_load (ObjectNode obj_node, int version, DiaC
 static DiaObject *custom_polyline_load   (ObjectNode obj_node, int version, DiaContext *ctx);
 static DiaObject *custom_bezierline_load (ObjectNode obj_node, int version, DiaContext *ctx);
 
-static void customline_save (DiaObject *object, ObjectNode obj_node, const char *filename);
+static void customline_save (DiaObject *object, ObjectNode obj_node, DiaContext *ctx);
 
 static ObjectTypeOps 
 custom_zigzagline_type_ops = {