riched32: Fix a few todos introduced by previous patch

[Alex Villací­s Lasso]

Changelog:
* Implement a portion of suggested interpretation of CRLF handling for 
richedit 1.0 emulation. Fixes a few todos introduced by previous 
riched32 patch.

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

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