[gimp] app: fix compiler warnings in GimpToolWidget

[Ell <ell src gnome org>]

commit ec6908335416074435bc7ade8364240289fe0518
Author: Ell <ell_se yahoo com>
Date:   Tue May 26 10:19:38 2020 +0300

    app: fix compiler warnings in GimpToolWidget

 app/display/gimptoolwidget.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/app/display/gimptoolwidget.c b/app/display/gimptoolwidget.c
index 3f2c590304..28f6f5075f 100644
--- a/app/display/gimptoolwidget.c
+++ b/app/display/gimptoolwidget.c
@@ -570,27 +570,27 @@ gimp_tool_widget_add_group (GimpToolWidget *widget)
 GimpCanvasGroup *
 gimp_tool_widget_add_stroke_group (GimpToolWidget *widget)
 {
-  GimpCanvasItem *item;
+  GimpCanvasGroup *group;
 
   g_return_val_if_fail (GIMP_IS_TOOL_WIDGET (widget), NULL);
 
-  item = gimp_tool_widget_add_group (widget);
-  gimp_canvas_group_set_group_stroking (GIMP_CANVAS_GROUP (item), TRUE);
+  group = gimp_tool_widget_add_group (widget);
+  gimp_canvas_group_set_group_stroking (group, TRUE);
 
-  return GIMP_CANVAS_GROUP (item);
+  return group;
 }
 
 GimpCanvasGroup *
 gimp_tool_widget_add_fill_group (GimpToolWidget *widget)
 {
-  GimpCanvasItem *item;
+  GimpCanvasGroup *group;
 
   g_return_val_if_fail (GIMP_IS_TOOL_WIDGET (widget), NULL);
 
-  item = gimp_tool_widget_add_group (widget);
-  gimp_canvas_group_set_group_filling (GIMP_CANVAS_GROUP (item), TRUE);
+  group = gimp_tool_widget_add_group (widget);
+  gimp_canvas_group_set_group_filling (group, TRUE);
 
-  return GIMP_CANVAS_GROUP (item);
+  return group;
 }
 
 void