[gegl] buffer: don't cache thread count in gegl_buffer_get_tile()

[N/A <ell src gnome org>]

commit 4b78e3a12d7339effc74437393b4b7e490f03cfb
Author: Ell <ell_se yahoo com>
Date:   Sat Jul 29 10:30:08 2017 -0400

    buffer: don't cache thread count in gegl_buffer_get_tile()
    
    Otherwise, if the thread count changes from 1 to >1 after the
    function has already been called, we fail to lock the storage
    mutex upon future calls.

 gegl/buffer/gegl-buffer.c |    9 +--------
 1 files changed, 1 insertions(+), 8 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer.c b/gegl/buffer/gegl-buffer.c
index d832f27..aca8adb 100644
--- a/gegl/buffer/gegl-buffer.c
+++ b/gegl/buffer/gegl-buffer.c
@@ -1208,16 +1208,9 @@ gegl_buffer_get_tile (GeglBuffer *buffer,
   GeglTileSource  *source  = (GeglTileSource*)buffer;
   GeglTile *tile;
 
-  static int threaded = -1;
-
-  if (threaded == -1)
-  {
-    threaded = gegl_config_threads () > 1;
-  }
-
   g_assert (source);
 
-  if (threaded)
+  if (gegl_config_threads () > 1)
   {
     GeglTileStorage *tile_storage = buffer->tile_storage;
     g_assert (tile_storage);