Fixed a bug with multiple inheritance and an indirect return type.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -1806,7 +1806,8 @@ namespace CppSharp.Generators.CSharp
 
                 Class retClass = null;
                 hiddenParam.Type.Desugar().IsTagDecl(out retClass);
-                WriteLine("var {0} = new {1}.Internal();", GeneratedIdentifier("ret"), QualifiedIdentifier(retClass));
+                WriteLine("var {0} = new {1}.Internal();", GeneratedIdentifier("ret"),
+                    QualifiedIdentifier(retClass.OriginalClass ?? retClass));
             }
 
             var names = new List<string>();

tests/CSharpTemp/CSharpTemp.h

@@ -22,6 +22,7 @@ class DLL_API Qux
 {
 public:
     int farAwayFunc() const;
+    int array[3];
 };
 
 class DLL_API Bar : public Qux