effect hook only triggers on known Key_LEDEffect* keys

src/Kaleidoscope-LEDControl.cpp

@@ -131,11 +131,12 @@ Key LEDControl::eventHandler(Key mappedKey, byte row, byte col, uint8_t keyState
     return mappedKey;
 
   if (keyToggledOn(keyState)) {
-    if (mappedKey.keyCode == 0)
+    if (mappedKey == Key_LEDEffectNext) {
       next_mode();
-    else
+    } else if (mappedKey == Key_LEDEffectPrevious) {
       prev_mode();
     }
+  }
 
   return Key_NoKey;
 }