[gnome-commander/Implement_CppCheck_suggestions] C++11 cast, use nullptr instead of NULL

[Uwe Scholz <uwescholz src gnome org>]

commit 2bb61af96485eddbbba7f1d5dfffceff9eaf137c
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Wed Mar 13 22:27:02 2019 +0100

    C++11 cast, use nullptr instead of NULL

 src/eggcellrendererkeys.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/eggcellrendererkeys.cc b/src/eggcellrendererkeys.cc
index 3b9b3806..afae68c0 100644
--- a/src/eggcellrendererkeys.cc
+++ b/src/eggcellrendererkeys.cc
@@ -418,10 +418,10 @@ void egg_cell_renderer_keys_get_size (GtkCellRenderer *cell,
                                       gint            *width,
                                       gint            *height)
 {
-    EggCellRendererKeys *keys = (EggCellRendererKeys *) cell;
+    auto keys = reinterpret_cast <EggCellRendererKeys*> (cell);
     GtkRequisition requisition;
 
-    if (keys->sizing_label == NULL)
+    if (keys->sizing_label == nullptr)
         keys->sizing_label = gtk_label_new (_("New accelerator…"));
 
     gtk_widget_size_request (keys->sizing_label, &requisition);