[Bug 503750] Crash when parameters of navigator.geolocation.getCurrentPosition are null. r/sr=jst

dom/src/geolocation/nsGeolocation.cpp

@@ -806,6 +806,8 @@ nsGeolocation::GetCurrentPosition(nsIDOMGeoPositionCallback *callback,
                                   nsIDOMGeoPositionErrorCallback *errorCallback,
                                   nsIDOMGeoPositionOptions *options)
 {
+  NS_ENSURE_ARG_POINTER(callback);
+
   if (sGeoEnabled == PR_FALSE)
     return NS_ERROR_NOT_AVAILABLE;
 
@@ -836,6 +838,8 @@ nsGeolocation::WatchPosition(nsIDOMGeoPositionCallback *aCallback,
                              nsIDOMGeoPositionOptions *aOptions, 
                              PRInt32 *_retval NS_OUTPARAM)
 {
+  NS_ENSURE_ARG_POINTER(aCallback);
+
   if (sGeoEnabled == PR_FALSE)
     return NS_ERROR_NOT_AVAILABLE;