fix missing goRef function

Author: SjB

bridge.go

@@ -219,7 +219,7 @@ func (f *valueFold) goRef() C.GoRef {
 
 // destroyRef remove the valueFold reference from the lookup table.
 func (f *valueFold) destroyRef() {
-	ref := goRef(f)
+	ref := C.GoRef(uintptr(unsafe.Pointer(f)))
 	delete(cgoFolds, ref)
 }
 

qml.go

@@ -800,7 +800,7 @@ func (obj *Common) On(signal string, function interface{}) {
 	csignal, csignallen := unsafeStringData(signal)
 	var cerr *C.error
 	RunMain(func() {
-		funcr := goRef(function)
+		funcr := C.GoRef(uintptr(unsafe.Pointer(&function)))
 		cerr = C.objectConnect(obj.addr, csignal, csignallen, obj.engine.addr, funcr, C.int(funcv.Type().NumIn()))
 		if cerr == nil {
 			connectedFunction[funcr] = function