can go below 0 & no means of resetting to 0

[Steve-Mcl]

Hi, great node and great concept.

However, I often give up and DIY this with an array (FIFO)

The issue is a flow glitch clocks the node below 0, the semaphore blocks until it is >= 0
The only way to get back to 0 is to push +n messages through a take node until it is zero once more.

Perhaps additional control method (or additional "clear" node) to clear/reset the semaphore queue would help the user recover more easily?
Also, preventing the semephe going below zero would help (i.e. only decrement current if there is something in the queue)

Thanks.