GUACAMOLE-249: Defer draws to unrealized (server-side) buffers until they are actually needed client-side.

Though deferred creation of buffers is already intended, creation was
not actually being deferred in practice as the act of initializing the
buffer with a solid rect of color was causing the buffer to be realized,
even if that initialization process is the only drawing operation that
will ever occur to that buffer.
1 file changed