server/red_worker: fix red_wait_pipe_item_sent

Resolves: rhbz#824384

red_wait_pipe_item_sent mistakingly returned without waiting for sending the given pipe item
when the channel wasn't blocked. As a result, we failed when we had to
destroy a surface (e.g., QXL_IO_DESTROY_ALL_SURFACES) and to release all
the drawables that are depended on it (by removing them or waiting they will be sent).
In addition, red_wait_pipe_item_sent increased and decreased the reference to the pipe item
using channel_cbs->hold_item, and channel_cbs->release_item. However,
these calls can be called only by red_channel, otherwise
display_channel_client_release_item_before_push is called twice and
leads to a double call to ring_remove(&dpi->base).
Instead ref/put_drawable_pipe_item should be called.

0 files changed, 0 insertions, 0 deletions