[gtk+] Typo fix

[Matthias Clasen <matthiasc src gnome org>]

commit f3150c3a43926be6b4df5952a6a01c7df5f58a1b
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Nov 5 19:43:39 2017 -0500

    Typo fix

 gdk/gdkwindow.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 2687dc0..2bf1ac9 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -6027,7 +6027,7 @@ gdk_window_create_similar_image_surface (GdkWindow *     window,
   else if (GDK_WINDOW_IMPL_GET_CLASS (window->impl)->create_similar_image_surface)
     {
       surface =
-        GDK_WINDOW_iMPL_GET_CLASS (window->impl)->create_similar_image_surface (window, format, width, 
height);
+        GDK_WINDOW_IMPL_GET_CLASS (window->impl)->create_similar_image_surface (window, format, width, 
height);
     }
   else
     {