Fixed move_consts_up() failure in some contexts (This partly fixes codegen/lea.c).
Fixed move_consts_up() failure in some contexts (This partly fixes codegen/lea.c).

[r26979]

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