pio_encode_wait_gpio does not respect gpiobase=16

[qdotme]

Consider the following (equivalent) blocks - one stalling on PIO, one on SIO. Got it to working by manually substracting the 16 from the GPIO pin number (pin_vsync = 45 in my design).

The PIO is correctly configured for supporting gpio_base=16, compiling the pioasm instructions correctly - but not when generated through pio_encode_wait_gpio

#if 1
pio_sm_exec(config->pio, config->pio_sm, 
	pio_encode_wait_gpio(1, config->pin_vsync - 16));
#else
while (gpio_get(config->pin_vsync) == 0);
#endif 

[kilograham]

I guess this is really a documentation issue

Worth looking at any similar functions and see if it is worth adding a variant which takes a PIO instance

[kilograham]

fix merged into develop; will be in next docs release