LED Matrix set() method does not work on top row

[karlsoderby]

While testing the set(x,y,r,g,b) method, I noticed the y coordinate only works from 1 and upwards, skipping the entire top row.

The x coordinate works as intended (starting at 0).

Here is the sketch (just blinks a pixel):

#include "ArduinoGraphics.h"
#include "Arduino_LED_Matrix.h"

ArduinoLEDMatrix matrix;

void setup() {
  //we start the LED matrix
  matrix.begin();
}

void loop() {
  int x = 0;
  int y = 0; //change to 1 to make it work
  matrix.beginDraw();
  matrix.set(x, y, 1,1,1);
  matrix.endDraw();
  delay(100);

  matrix.beginDraw();
  matrix.set(x, y, 0,0,0);
  matrix.endDraw();
  delay(100);
}

Additional Note: the set() method was originally created for an RGB matrix. I think it would make sense to replace 0,0,0 and 1,1,1 with something like PIXEL_OFF / PIXEL_ON, by adding a #define PIXEL_ON 1,1,1.

Like: matrix.set(x, y, PIXEL_ON) instead of matrix.set(x, y, 1, 1, 1).