~technomancy/fennel#227: new "expected whitespace" warning false positives

The new "expected whitespace before token" warning is firing on unrelated parser errors:

Compiling

(local a~b 3)

Prints the warning to stderr before the expected error:

--WARNING: -:1: expected whitespace before token
-:1:9: Parse error: invalid character: ~

Moved this to after the error check and that seems to have done the trick.