Fix overrides in cffi

Author: tobil4sk

include/hx/CFFILoader.h

@@ -127,7 +127,7 @@ extern "C" ret name def_args;
    struct DynAlloc : public hx::IStringAlloc
    {
       #define WANT_DYNALLOC_ALLOC_BYTES
-      void *allocBytes(size_t n);
+      void *allocBytes(size_t n) HXCPP_OVERRIDE;
    };
 
 

include/hx/StringAlloc.h

@@ -16,6 +16,14 @@ class IStringAlloc
       ~IStringAlloc(){};
 };
 
+#ifndef HXCPP_OVERRIDE
+   #if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSVC_LANG >= 201103L)
+      #define HXCPP_OVERRIDE override
+   #else
+      #define HXCPP_OVERRIDE
+   #endif
+#endif
+
 template<int STACK>
 class StringAlloc : public IStringAlloc
 {