HidController: improve comments

src/controllers/hid/hidcontroller.cpp

@@ -248,14 +248,14 @@ int HidController::close() {
 bool HidController::poll() {
     Trace hidRead("HidController poll");
 
-    int result = 1;
     // This loop risks becoming a high priority endless loop in case processing
     // the mapping JS code takes longer than the controller polling rate.
     // This could stall other low priority tasks.
     // There is no safety net for this because it has not been demonstrated to be
     // a problem in practice.
+    int result = 1; // arbitrary value > 0 to start the loop
     while (result > 0) {
-        // Rotate between two buffers so the memcmp below does not require deep copying to another buffer.
+        // Cycle between buffers so the memcmp below does not require deep copying to another buffer.
         unsigned char* pPreviousBuffer = m_pPollData[m_iPollingBufferIndex];
         m_iPollingBufferIndex = (m_iPollingBufferIndex + 1) % kNumBuffers;
         unsigned char* pCurrentBuffer = m_pPollData[m_iPollingBufferIndex];