Fix handling of protected methods in Go when using directors.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12492 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/go/director_alternating_runme.go

@@ -0,0 +1,10 @@
+package main
+
+import . "./director_alternating"
+
+func main() {
+	id := GetBar().Id()
+	if id != IdFromGetBar() {
+		panic(id)
+	}
+}