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possible munmap bug

 This was causing my build of gcc to fail.
 File winsup/cygwin/ version 1.86 (and earlier) function munmap
 when unmapping a 64K record, passes the wrong parameters to fhandler_base::munmap,
 passing the function parameter address/length instead of a block local version.

 This patch explains it all.

diff -r -p -U 5 cygwin-snapshot-20030924-1/winsup/cygwin/ new_cygwin/winsup/cygwin/
--- cygwin-snapshot-20030924-1/winsup/cygwin/	2003-09-25 10:40:33.000000000 +1000
+++ new_cygwin/winsup/cygwin/	2003-09-26 11:34:29.984375000 +1000
@@ -679,11 +679,11 @@ munmap (void *addr, size_t len)
 	  mmap_record *rec = map_list->get_record (record_idx);
 	  if (rec->unmap_pages (u_addr, u_len))
 	      /* The whole record has been unmapped, so... */
 	      fhandler_base *fh = rec->alloc_fh ();
-	      fh->munmap (rec->get_handle (), (caddr_t)addr, len);
+	      fh->munmap (rec->get_handle (), (caddr_t)u_addr, u_len);
 	      rec->free_fh (fh);
 	      /* ...delete the record. */
 	      if (map_list->del_record (record_idx--))

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