[mutter] wayland: Don't leak the existing texture if we already have one

[Jasper St. Pierre <jstpierre src gnome org>]

commit 1de740955f82ba6b3b3c0385f0d88106b7a6c9ac
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Sep 16 12:11:34 2014 -0600

    wayland: Don't leak the existing texture if we already have one
    
    We were missing a check in ensure_buffer_texture that checked if we
    already had a CoglTexture bound for the buffer.

 src/wayland/meta-wayland-surface.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/wayland/meta-wayland-surface.c b/src/wayland/meta-wayland-surface.c
index 771154a..c231b41 100644
--- a/src/wayland/meta-wayland-surface.c
+++ b/src/wayland/meta-wayland-surface.c
@@ -151,6 +151,9 @@ ensure_buffer_texture (MetaWaylandBuffer *buffer)
   CoglError *catch_error = NULL;
   CoglTexture *texture;
 
+  if (buffer->texture)
+    return;
+
   texture = COGL_TEXTURE (cogl_wayland_texture_2d_new_from_buffer (ctx,
                                                                    buffer->resource,
                                                                    &catch_error));