c_str() all places where it is not needed anymore.
(I also add config.h to several files that was missing it)
+ added s string constructor to math_symbolinset
I also change some "while(" to "while ("
mmm ... yes ... I add a "zero()" function to LyXLength... an "empty()"
function did not seem appropriate. changed a couple of places that
checked on length.value() != 0.0.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3149 a592a061-630c-0410-9148-cb99ea01b6c8
make *stream 'class' instead of 'struct' (not finished);
use LCOlor::mathline only for boxes.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3140 a592a061-630c-0410-9148-cb99ea01b6c8
