Add cloud with disturbance tiles for invisible monsters in cloud.

This fix Mantis 2573.

I didn't do ink, forest fire, holy flames and gloom because even though they are
supposed to be opaque clouds, it seemed unnecessary.

To make the tiles, I used the unseen monster tile, filed it with 50% gray,
blurred it and used it as a layer mask to add transparency to the clouds.
I saved the shape as UNUSED/other/cloud_disturbance_shape.png
This is my first tiles, so someone more skilled should be able to do better.

1 files changed, 1 insertions, 1 deletions

diff --git a/crawl-ref/source/tilepick.h b/crawl-ref/source/tilepick.h
index a28dc17a81..91bae72b64 100644
--- a/crawl-ref/source/tilepick.h
+++ b/crawl-ref/source/tilepick.h
@@ -31,7 +31,7 @@ tileidx_t tileidx_item(const item_def &item);
 tileidx_t tileidx_item_throw(const item_def &item, int dx, int dy);
 tileidx_t tileidx_known_base_item(tileidx_t label);
 
-tileidx_t tileidx_cloud(const cloud_struct &cl);
+tileidx_t tileidx_cloud(const cloud_struct &cl, bool disturbance = false);
 tileidx_t tileidx_bolt(const bolt &bolt);
 tileidx_t tileidx_zap(int colour);
 tileidx_t tileidx_spell(spell_type spell);