[project @ 1999-03-03 18:58:53 by sof]

scavenge_srt: To deal with SRT entries that refer to closures that live
 in DLLs, the compiler will set the LSB of the address. scavenge_srt()
 checks for this, and if LSB is set, does an extra level of indirection
 to get at the next closure to scavenge.