Carlo Bernaschina 1948fef8d5 Avoid race condition into NotifyNextFrameOnce (#3980)
If GPURasterizer::NotifyNextFrameOnce was rapidly invoked twice could
have lead to a null pointer exception.

Also ftp::WeakPtr are not thread safe and should not be dereferenced
from other threads.
2017-08-15 14:35:16 -07:00
..