user: fix DrawTextExA/W on empty strings.

[Paul Vriens]

On Wed, 2006-01-25 at 14:03 -0500, Dimi Paun wrote:
> From: "Rein Klazes" <wijn at wanadoo.nl>
> > Wrong, look again.
> 
> You must be kidding. Care to explain how 'stmt'
> can ever be executed in:
> 
> ...
>    if (A || B) return;
>    if (B) stmt;
> ...
> 
But there's an if in between:

if (count == -1) count = strlenW(str);

Paul.