richedit: add tests for EM_FINDTEXT in 1.0 emulation, make them pass under Wine

[Alex Villací­s Lasso]

Alex Villací­s Lasso escribió:
> EM_FINDTEXT and EM_FINDTEXTEX have different rules for interpreting 
> ranges for 1.0 and 2.0 modes:
>
> In 1.0 emulation cpMin > cpMax is invalid and always fails.
> In 1.0 emulation, search is always done between cpMin and cpMax, even 
> backwards search.
> In 1.0 emulation, cpMax == -1 assumes FR_DOWN, even if not set.
>
> This goes a long way towards resolving richedit search problems in bug 
> #709.
>
> Changelog:
> * Add tests for EM_FINDTEXT in 1.0 emulation, make them pass under Wine
>
My bad, it is bug #4144 that is being addressed with this patch.

-- 
perl -e '$x=2.4;print sprintf("%.0f + %.0f = %.0f\n",$x,$x,$x+$x);'