LSM303.set_mag_gain does not refer instantiated object

[ggoetz]

LSM303.set_mag_gain does not refer instantiated object.

Consequently, the following code fails:
lsm303 = Adafruit_LSM303.LSM303()
lsm303.set_mag_gain(gain=0x80)
with a TypeError: set_mag_gain() got multiple values for argument 'gain'

Changing line 88 of LSM303.py from:
def set_mag_gain(gain=LSM303_MAGGAIN_1_3):
to
def set_mag_gain(self, gain=LSM303_MAGGAIN_1_3):
fixes the issue.

[ggoetz]

Pull request #3 fixes the issue.

[siddacious]

Thank you.

This library has been replaced by two new libraries, one for each sensor in the LSM303DLH:

https://github.com/adafruit/Adafruit_CircuitPython_LSM303_Accel
https://github.com/adafruit/Adafruit_CircuitPython_LSM303DLH_Mag

Your specific feedback isn't relevant to the new library but thank you for taking the time to point it out.