Added StringOutRef test.

Moved const char string in/out into its own test function.

tests/Basic/Basic.Tests.cs

@@ -55,10 +55,18 @@ public class BasicTests : GeneratorTestFixture
         //Assert.That(hello.RetEnum(Enum.D), Is.EqualTo(-2147483648));
         Assert.That(hello.RetEnum(Enum.E), Is.EqualTo(1));
         Assert.That(hello.RetEnum(Enum.F), Is.EqualTo(-9));
+    }
+
+    [Test]
+    public void TestPrimitiveConstCharStringInOut()
+    {
+        var hello = new Hello();
 
         string str;
         hello.StringOut(out str);
         Assert.That(str, Is.EqualTo("HelloStringOut"));
+        hello.StringOutRef(out str);
+        Assert.That(str, Is.EqualTo("HelloStringOutRef"));
     }
     
     [Test]

tests/Basic/Basic.cpp

@@ -208,6 +208,11 @@ void Hello::StringOut(CS_OUT const char** str)
 	*str = "HelloStringOut";
 }
 
+void Hello::StringOutRef(CS_OUT const char*& str)
+{
+	str = "HelloStringOutRef";
+}
+
 int unsafeFunction(const Bar& ret, char* testForString, void (*foo)(int))
 {
     return ret.A;

tests/Basic/Basic.h

@@ -134,6 +134,7 @@ public:
     void EnumInOutRef(CS_IN_OUT Enum& e);
 
     void StringOut(CS_OUT const char** str);
+    void StringOutRef(CS_OUT const char*& str);
 };
 
 class DLL_API AbstractFoo