[gimp/gimp-2-10] libgimp: in GimpTileBackendPlugin, use gegl_tile_backend_command()

[Ell <ell src gnome org>]

commit d3cab633de6bcc1039d12046222b6b94da64fd13
Author: Ell <ell_se yahoo com>
Date:   Sun Aug 19 19:43:10 2018 -0400

    libgimp: in GimpTileBackendPlugin, use gegl_tile_backend_command()
    
    In the command handler of GimpTileBackendPlugin, forward unhandled
    commands to gegl_tile_backend_command(), instead of asserting that
    they're within range (which has already been disabled by commit
    bc3b076caffa12fc38f473b31d4197045fe23476).  See GEGL commit
    30047e65723ebb44fcde9c6b5f60ceecb43b0895.
    
    (cherry picked from commit 668fee966a6b94a8314e0d3ce0d11d4661bf613d)

 libgimp/gimptilebackendplugin.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/libgimp/gimptilebackendplugin.c b/libgimp/gimptilebackendplugin.c
index 383c7370e0..6c37371f0e 100644
--- a/libgimp/gimptilebackendplugin.c
+++ b/libgimp/gimptilebackendplugin.c
@@ -161,7 +161,8 @@ gimp_tile_backend_plugin_command (GeglTileSource  *tile_store,
       break;
 
     default:
-      /* g_assert (command < GEGL_TILE_LAST_COMMAND && command >= 0); */
+      result = gegl_tile_backend_command (GEGL_TILE_BACKEND (tile_store),
+                                          command, x, y, z, data);
       break;
     }