generator to the typecheck pass, so that it also works for platforms
    that use the parentfpstruct way to handle accesses to nested frames
    in case the array has been migrated to such a parentfpstruct
   o additionally, the number of comparisons for such range checks
     has been reduced from 3 (for signed indices) or 2 (for unsigned
     indices) to 1 in all cases
   o the range checking code is disabled for the JVM target, as the
     JVM automatically range checks all array accesses itself anyway

git-svn-id: trunk@34034 -