Panic 841 with coordinates outside the screen

[martinwork]

If coordinates are outside the screen, it calculates an index outside the _screen buffer, which triggers panic 841.

OLED12864_I2C/OLED12864_I2C.ts

Line 192 in 127c10d

let ind = x * (_ZOOM + 1) + page * 128 + 1

OLED12864_I2C/OLED12864_I2C.ts

Line 231 in 127c10d

ind = (x + n) * 5 * (_ZOOM + 1) + y * 128 + i * (_ZOOM + 1) + 1