Use standard timeout checker for LED-Wavepool

Signed-off-by: Michael Richters <gedankenexperimenter@gmail.com>

src/kaleidoscope/plugin/LED-Wavepool.cpp

@@ -81,14 +81,14 @@ void WavepoolEffect::TransientLEDMode::raindrop(uint8_t x, uint8_t y, int8_t *pa
 uint8_t WavepoolEffect::TransientLEDMode::wp_rand() {
   static uint16_t offset = 0x400;
   offset = ((offset + 1) & 0x4fff) | 0x400;
-  return (millis() / MS_PER_FRAME) + pgm_read_byte(offset);
+  return (Kaleidoscope.millisAtCycleStart() / MS_PER_FRAME) + pgm_read_byte(offset);
 }
 
 void WavepoolEffect::TransientLEDMode::update(void) {
 
   // limit the frame rate; one frame every 64 ms
   static uint8_t prev_time = 0;
-  uint8_t now = millis() / MS_PER_FRAME;
+  uint8_t now = Kaleidoscope.millisAtCycleStart() / MS_PER_FRAME;
   if (now != prev_time) {
     prev_time = now;
   } else {