fix compile warnings

Author: gfwilliams

src/jswrap_espruino.c

@@ -704,7 +704,7 @@ Called when a bit rises or falls above a set level. See `E.setComparator` for se
   "generate" : "jswrap_espruino_setComparator_eventHandler"
 }
 */
-void jswrap_espruino_setComparator_eventHandler(IOEventFlags eventFlags, uint8_t *data, int *length) {
+void jswrap_espruino_setComparator_eventHandler(IOEventFlags eventFlags, uint8_t *data, int length) {
 #if defined(NRF52_SERIES) && !defined(SAVE_ON_FLASH)
   // see jshSetComparator / E.setComparator
   IOCustomEventFlags customFlags = *(IOCustomEventFlags*)data;

src/jswrap_espruino.h

@@ -30,7 +30,7 @@ void jswrap_espruino_FFT(JsVar *arrReal, JsVar *arrImag, bool inverse);
 
 void jswrap_espruino_enableWatchdog(JsVarFloat time, JsVar *isAuto);
 void jswrap_espruino_kickWatchdog();
-void jswrap_espruino_setComparator_eventHandler(IOEventFlags eventFlags, uint8_t *data, int *length);
+void jswrap_espruino_setComparator_eventHandler(IOEventFlags eventFlags, uint8_t *data, int length);
 void jswrap_espruino_setComparator(Pin pin, JsVarFloat level);
 /// Return an array of errors based on the current flags
 JsVar *jswrap_espruino_getErrorFlagArray(JsErrorFlags flags);