[gtk/wip/baedert/for-master] label: Only care about clipboard in unrealize of we need to

[Timm Bäder <baedert src gnome org>]

commit d0bb72a2aa4c29a0dfd9bf70e0575f93e6a0b50e
Author: Timm Bäder <mail baedert org>
Date:   Sat Jun 27 11:38:25 2020 +0200

    label: Only care about clipboard in unrealize of we need to

 gtk/gtklabel.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index b281422683..a42ff5a29d 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -3573,12 +3573,15 @@ static void
 gtk_label_unrealize (GtkWidget *widget)
 {
   GtkLabel *self = GTK_LABEL (widget);
-  GdkClipboard *clipboard;
 
-  clipboard = gtk_widget_get_primary_clipboard (widget);
   if (self->select_info &&
-      gdk_clipboard_get_content (clipboard) == self->select_info->provider)
-    gdk_clipboard_set_content (clipboard, NULL);
+      self->select_info->provider)
+    {
+      GdkClipboard *clipboard = gtk_widget_get_primary_clipboard (widget);
+
+      if (gdk_clipboard_get_content (clipboard) == self->select_info->provider)
+        gdk_clipboard_set_content (clipboard, NULL);
+    }
 
   GTK_WIDGET_CLASS (gtk_label_parent_class)->unrealize (widget);
 }