msi 4: Add initial implementation of the DirectoryCombo control

[Mike McCormack]

James Hawkins wrote:

> +        indirect = msi_dup_property( dialog->package, control->property );
> +        prop = indirect;
> +    }
> +
> +    val = msi_dup_property( dialog->package, prop );
> +    lstrcpynW( path, val, MAX_PATH );
> +
> +    PathStripPathW( path );
> +    PathRemoveBackslashW( path );

Calling msi_dup_property allocates new strings, so you need to remember 
to free those strings too.

Since it's allocated, why not use PathStripPathW and 
PathRemoveBackslashW on the allocated string, rather than trying to copy 
it first?

Mike