dlls/userenv: fixed stubs GetUserProfileDirectoryW/A (4)

[Jeremy White]

> Much less important but still: please remove trailing whitespaces.
> 'git apply' should not produce any warnings.

I've discovered that if you use git-add to fully stage your commit, you 
can then run:
  git-diff-index --check HEAD
immediately prior to committing; that will catch such warnings while
it's easy to fix them.

Cheers,

Jeremy