[cogl-material] make _cogl_material_layer_free check for an invalid texture handle

It is valid in some situations to have a material layer with an invalid texture
handle (e.g. if you setup a texture combine mode before setting the texture)
and so _cogl_material_layer_free needs to check for a valid handle before
attempting to unref it.

diff --git a/clutter/cogl/common/cogl-material.c b/clutter/cogl/common/cogl-material.c
index 699ea0a..2c7df33 100644 (file)
--- a/clutter/cogl/common/cogl-material.c
+++ b/clutter/cogl/common/cogl-material.c
@@ -644,7 +644,8 @@ cogl_material_set_layer_matrix (CoglHandle material_handle,
 static void
 _cogl_material_layer_free (CoglMaterialLayer *layer)
 {
-  cogl_handle_unref (layer->texture);
+  if (layer->texture != COGL_INVALID_HANDLE)
+    cogl_handle_unref (layer->texture);
   g_free (layer);
 }