[gimp] app: fix precondition return values in gimp_tool_widget_get_popup()

[Ell <ell src gnome org>]

commit 4b1c8f9ec7e4da6118da26f162f0cf91d968718f
Author: Ell <ell_se yahoo com>
Date:   Tue May 26 11:05:58 2020 +0300

    app: fix precondition return values in gimp_tool_widget_get_popup()

 app/display/gimptoolwidget.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/display/gimptoolwidget.c b/app/display/gimptoolwidget.c
index dba2a91ac6..22db01215e 100644
--- a/app/display/gimptoolwidget.c
+++ b/app/display/gimptoolwidget.c
@@ -1119,8 +1119,8 @@ gimp_tool_widget_get_popup (GimpToolWidget        *widget,
                             GdkModifierType        state,
                             const gchar          **ui_path)
 {
-  g_return_val_if_fail (GIMP_IS_TOOL_WIDGET (widget), FALSE);
-  g_return_val_if_fail (coords != NULL, FALSE);
+  g_return_val_if_fail (GIMP_IS_TOOL_WIDGET (widget), NULL);
+  g_return_val_if_fail (coords != NULL, NULL);
 
   if (widget->private->visible &&
       GIMP_TOOL_WIDGET_GET_CLASS (widget)->get_popup)