Fix compiler warning on HardwareTimer (#2256)

Signed-off-by: ldursw <[email protected]>
Co-authored-by: Frederic Pillon <[email protected]>

Author: ldursw

Diff for: libraries/SrcWrapper/src/HardwareTimer.cpp

@@ -168,6 +168,10 @@ void HardwareTimer::pause()
   */
 void HardwareTimer::pauseChannel(uint32_t channel)
 {
+  if ((channel < 1) || (channel > TIMER_CHANNELS)) {
+    return;
+  }
+
   int timAssociatedInputChannel;
   int LLChannel = getLLChannel(channel);
   if (LLChannel == -1) {