fix VectorShape on_dirty callback registration being set for the wrong type
fix VectorShape on_dirty callback registration being set for the wrong type

adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython