else on version blocks is buggy if after another else

[nddrylliog]

Example:

version(windows) {
  if (something) {
    // something
  } else {
    // something else
  }
} else {
  // should be equivalent to version(!windows) but isn't
}

The generated code actually has two dangling elses.

[nddrylliog]

In my opinion, else should actually be children nodes of their predecessor. So, the first else should be a children of the if, and the second else should be a children of the version node.

It shouldn't interfere much with our AST transformations, but it should make it a lot clearer what else belongs to what.

[alexnask]

Agreed, more stuff for .98!
Btw, you are on a roll today!