- when a graph is lowered because of struct return changes, transform   the value param arguments in the same way like all "register" arguments:   this fixes fehler162.c
- when a graph is lowered because of struct return changes, transform
  the value param arguments in the same way like all "register" arguments:
  this fixes fehler162.c

[r23408]

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