Added reference test case.

tests/Basic/Basic.Tests.cs

@@ -70,6 +70,9 @@ public class BasicTests : GeneratorTestFixture
         str = "Hello";
         hello.StringInOut(ref str);
         Assert.That(str, Is.EqualTo("StringInOut"));
+        str = "Hello";
+        hello.StringInOutRef(ref str);
+        Assert.That(str, Is.EqualTo("StringInOutRef"));
     }
     
     [Test]

tests/Basic/Basic.cpp

@@ -222,6 +222,14 @@ void Hello::StringInOut(CS_IN_OUT const char** str)
 		*str = "Failed";
 }
 
+void Hello::StringInOutRef(CS_IN_OUT const char*& str)
+{
+	if (strcmp(str, "Hello") == 0)
+		str = "StringInOutRef";
+	else
+		str = "Failed";
+}
+
 int unsafeFunction(const Bar& ret, char* testForString, void (*foo)(int))
 {
     return ret.A;

tests/Basic/Basic.h

@@ -136,7 +136,7 @@ public:
     void StringOut(CS_OUT const char** str);
     void StringOutRef(CS_OUT const char*& str);
     void StringInOut(CS_IN_OUT const char** str);
-    //void StringInOutRef(CS_OUT const char*& str);
+    void StringInOutRef(CS_IN_OUT const char*& str);
 };
 
 class DLL_API AbstractFoo