Pointer to __VOID does not generate type correctly

[Angus-Bethke-Bachmann]

Describe the bug
Pointer to VOID does not correctly generate its type and leaves the definition blank, resulting in a compilation error.

To Reproduce

FUNCTION_BLOCK ASYNC_Task
VAR
    _Internal_ : POINTER TO __VOID;
END_VAR

typedef struct {
    uint64_t *__vtable;
    *_Internal_;
} ASYNC_Task_type;

Expected behavior
In the above example, the _Internal_ variable should be generated with the "void" type uint64_t*.

Additional context
Initially reported by Guillaume.