add a more descriptive comment

src/Kaleidoscope.cpp

@@ -12,7 +12,9 @@ Kaleidoscope_::setup(void) {
   KeyboardHardware.setup();
   Keyboard.begin();
 
-  // A workaround, so that the compiler does not optimize this out...
+  // A workaround, so that the compiler does not optimize handleKeyswitchEvent out...
+  // This is a no-op, but tricks the compiler into not being too helpful 
+  // TODO: figure out how to hint the compiler in a more reasonable way
   handleKeyswitchEvent(Key_NoKey, 255, 255, 0);
 
   // Update the key cache, so we start with a non-empty state.