[gimp] gimpwarptool: use the linear sampler for the warp tool to ensure crisp lines after an erase.

[Simon Budig <simon src gnome org>]

commit c333a04f185872d37178e3710e0ccc3d619b55ca
Author: Simon Budig <simon budig de>
Date:   Tue Sep 27 00:37:42 2016 +0200

    gimpwarptool: use the linear sampler for the warp tool to ensure crisp lines after an erase.

 app/tools/gimpwarptool.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/app/tools/gimpwarptool.c b/app/tools/gimpwarptool.c
index 9c000fc..842b3ba 100644
--- a/app/tools/gimpwarptool.c
+++ b/app/tools/gimpwarptool.c
@@ -725,6 +725,7 @@ gimp_warp_tool_create_graph (GimpWarpTool *wt)
 
   render = gegl_node_new_child (graph,
                                 "operation", "gegl:map-relative",
+                                "sampler_type", GEGL_SAMPLER_LINEAR,
                                 NULL);
 
   gegl_node_connect_to (input,  "output",