editeng: SvxRTFParser sal_Bool to bool

Change-Id: I2159f5c45ec6e6df965836705792cf2d71abbc42
fdo#85812: RTF import: better fix for run type in new groups

Apparently Word treats \ltrch \rtlch differently from
\loch \hich \dbch when groups are opened.

Change-Id: I257712521e8e77fa66e76857489797ecc675506e