[gtk+] overlay: Remove unused NULL-check

[Timm Bäder <baedert src gnome org>]

commit afea2545265faf660ef0720394eb4e1773bc5ab0
Author: Timm Bäder <mail baedert org>
Date:   Fri Oct 20 15:12:28 2017 +0200

    overlay: Remove unused NULL-check

 gtk/gtkoverlay.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkoverlay.c b/gtk/gtkoverlay.c
index 85d918c..6ae2964 100644
--- a/gtk/gtkoverlay.c
+++ b/gtk/gtkoverlay.c
@@ -173,8 +173,7 @@ gtk_overlay_get_main_widget_allocation (GtkOverlay *overlay,
       main_alloc.height = gtk_widget_get_allocated_height (GTK_WIDGET (overlay));
     }
 
-  if (main_alloc_out)
-    *main_alloc_out = main_alloc;
+  *main_alloc_out = main_alloc;
 }
 
 static void