BugFix: rbitset_alloca() cannot be implemented as a function. More doxygen comments added.
BugFix: rbitset_alloca() cannot be implemented as a function.
More doxygen comments added.

[r13500]

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