Relatively pathed proc creates bad DMObjectTree entries

[ike709]

datum
    var
        foo = 1
        bar = 0
    proc
        meep()
            return foo
        beep()
            return bar

This code results in /datum/var and /datum/proc being added to DMObjectTree as types. This is due to Block() inside of DMParser.Statement().

[wixoaGit]

#2173 Fixes this for var