Ignore first event on edge type change in wait_for_edge()
Ignore first event on edge type change in wait_for_edge()

stefan2904/raspberry-gpio-python,VCTLabs/RPi.GPIO,VCTLabs/RPi.GPIO,stefan2904/raspberry-gpio-python,VCTLabs/RPi.GPIO,stefan2904/raspberry-gpio-python,VCTLabs/RPi.GPIO