- BugFix: fixed ia32_transform_sub_to_neg_add() with used flags case
- BugFix: fixed ia32_transform_sub_to_neg_add() with used flags case

[r20069]

MatzeB/libfirm,8l/libfirm,libfirm/libfirm,jonashaag/libfirm,8l/libfirm,libfirm/libfirm,davidgiven/libfirm,jonashaag/libfirm,MatzeB/libfirm,jonashaag/libfirm,killbug2004/libfirm,killbug2004/libfirm,davidgiven/libfirm,8l/libfirm,jonashaag/libfirm,davidgiven/libfirm,8l/libfirm,8l/libfirm,libfirm/libfirm,libfirm/libfirm,MatzeB/libfirm,davidgiven/libfirm,libfirm/libfirm,jonashaag/libfirm,jonashaag/libfirm,davidgiven/libfirm,killbug2004/libfirm,davidgiven/libfirm,jonashaag/libfirm,MatzeB/libfirm,MatzeB/libfirm,killbug2004/libfirm,8l/libfirm,davidgiven/libfirm,MatzeB/libfirm,MatzeB/libfirm,8l/libfirm,killbug2004/libfirm,killbug2004/libfirm,killbug2004/libfirm