[gtk+] cannot not -> must

[Matthias Clasen <matthiasc src gnome org>]

commit 85b44a3e20d203ce9084ab515a284c2872e12294
Author: Caolán McNamara <caolanm redhat com>
Date:   Tue Jan 26 12:08:01 2016 +0000

    cannot not -> must
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761826

 gtk/gtkwidget.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index bc1f786..08bd939 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -2925,7 +2925,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
    * made based solely on the cursor position and the type of the data, the
    * handler may inspect the dragged data by calling gtk_drag_get_data() and
    * defer the gdk_drag_status() call to the #GtkWidget::drag-data-received
-   * handler. Note that you cannot not pass #GTK_DEST_DEFAULT_DROP,
+   * handler. Note that you must pass #GTK_DEST_DEFAULT_DROP,
    * #GTK_DEST_DEFAULT_MOTION or #GTK_DEST_DEFAULT_ALL to gtk_drag_dest_set()
    * when using the drag-motion signal that way.
    *