FrameBuf does not check if there is space when reading out frames

[ZoeyR]

I ran into this bug when trying to test streaming files as chunks of Vec<u8>. My program would often panic because FrameBuf would run out of capacity.

Backtrace: http://pastebin.com/6G0n2WmP
Location in code missing check: https://github.com/tokio-rs/tokio-proto/blob/master/src/streaming/multiplex/advanced.rs#L278

I realize that this had been marked TODO in the code, but there was no issue for it.

[carllerche]

Thanks for the report, definitely worth having the issue tracked.