[wintab32] Refine how we determine cursor types; use that to discard non tablet devices.

[Robert Shearman]

Jeremy White wrote:
> +/* FIXME:  strcasestr is not available on all platforms; implement a simple version */
> +static char * poormans_strcasestr(const char *haystack, const char *needle)
>   

This is something that can be put in include/wine/port.h.

-- 
Rob Shearman