Restart the cycle early if the palette does not change

Fixes #3.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Kaleidoscope/FingerPainter.cpp

@@ -81,13 +81,19 @@ namespace KaleidoscopePlugins {
     if (!key_toggled_on (keyState))
       return Key_NoKey;
 
+    cRGB oldColor, newColor;
+
     uint16_t location = row * COLS + col;
     uint8_t colorIndex = EEPROM.read (colorBase + location);
     if (colorIndex == 255)
       colorIndex = 0;
+    EEPROM.get (paletteBase + colorIndex * sizeof (cRGB), oldColor);
     colorIndex++;
     if (colorIndex > 15)
       colorIndex = 0;
+    EEPROM.get (paletteBase + colorIndex * sizeof (cRGB), newColor);
+    if (memcmp (&oldColor, &newColor, sizeof (cRGB)) == 0)
+      colorIndex = 0;
     EEPROM.update (colorBase + location, colorIndex);
 
     return Key_NoKey;