Fixed handling of overriden methods.

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -511,7 +511,7 @@ namespace CppSharp.Generators.CLI
 
             GenerateDeclarationCommon(method);
 
-            if (method.IsOverride)
+            if (method.IsVirtual || method.IsOverride)
                 Write("virtual ");
 
             if (method.IsStatic)

src/Parser/Parser.cpp

@@ -790,6 +790,7 @@ CppSharp::AST::Method^ Parser::WalkMethodCXX(clang::CXXMethodDecl* MD)
     Method->OperatorKind = GetOperatorKindFromDecl(Name);
     Method->IsStatic = MD->isStatic();
     Method->IsVirtual = MD->isVirtual();
+    Method->IsOverride = MD->size_overridden_methods() > 0;
 
     WalkFunction(MD, Method);