[gtk/event-types: 1/4] Fix compiler warning

[Emmanuele Bassi <ebassi src gnome org>]

commit 2e7f01d1eec7411ec5bfae915945db9fb7d192e3
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Apr 16 16:37:41 2020 +0100

    Fix compiler warning
    
    Newer versions of GCC are fairly aggressive with NULL checks.

 gtk/gtktextview.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index c4f7266515..1835c4fd14 100644
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -4354,7 +4354,7 @@ gtk_text_view_get_gutter (GtkTextView       *text_view,
 
   childp = find_child_for_window_type (text_view, win);
 
-  if (*childp != NULL)
+  if (childp != NULL && *childp != NULL)
     return GTK_WIDGET (*childp);
 
   return NULL;
@@ -4388,6 +4388,9 @@ gtk_text_view_set_gutter (GtkTextView       *text_view,
                     win == GTK_TEXT_WINDOW_BOTTOM);
 
   childp = find_child_for_window_type (text_view, win);
+  if (childp == NULL)
+    return;
+
   old_child = *childp;
 
   if ((GtkWidget *)old_child == widget)