[PATCH 1/6] mf/samplegrabber: Always release cancellation key when timer is invoked.

[Nikolay Sivov]

On 1/4/22 20:35, Derek Lesho wrote:
> The sample grabber currently leaks the key on the last invokation of the timer, as it is only released when stream_schedule_sample is called.
It's also released when sample grabber sink is released. Is that not 
always enough? Or is that useful when sink is reused for next topology?