Add semantic patch to find void f() { ... return ((void)g())); ... }

Add semantic patch to find void f() { ... return ((void)g())); ... }

When a function returns void, it can be used as an argument to return in
function returning also void, e.g.:

void in(void) {
  return;
}

void out(void) {
  return (in());
}

while this is legal, it should be rewritten as:

void out(void) {
  in();
  return;
}

The semantic patch just find the occurrences, and they need to be fixed
by hand.