[gtk+] gsk: Don't leak texture surfaces

[Matthias Clasen <matthiasc src gnome org>]

commit 585b1d5f67b8a2001af9759c06b9b76556706b9c
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Nov 17 20:29:07 2016 -0500

    gsk: Don't leak texture surfaces
    
    gsk_texture_download returns a reference.

 gsk/gskgldriver.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskgldriver.c b/gsk/gskgldriver.c
index edb6653..4bcc376 100644
--- a/gsk/gskgldriver.c
+++ b/gsk/gskgldriver.c
@@ -467,6 +467,7 @@ gsk_gl_driver_get_texture_for_texture (GskGLDriver *driver,
                                            surface,
                                            min_filter,
                                            mag_filter);
+  cairo_surface_destroy (surface);
 
   return t->texture_id;
 }