C++ standard dictates that NULL / 0 / nullptr is a valid argument for
delete which then simply has no effect:
"The value of the first argument supplied to a deallocation function may
be a null pointer value; if so, and if the deallocation function is one
supplied in the standard library, the call has no effect."
I therefore think in these particular case it's safe to remove the ifs.
- Avoid polling when only one input channel is used.
- Send only handles for shared memory transport.
- Avoid waiting in the rate logger thread when nothing to log.
- Hide warnings from generated files
- Fix#483
