Prototypes for lin-thread.c

[Mark Kettenis]

   From: Andreas Jaeger <aj@suse.de>
   Date: 23 May 2000 16:27:05 +0200

[Michael, looks like the patch mentioned below has fallen through the
 cracks]

Andreas, if you're messing with lin-thread.c, please take a look at:

  http://sourceware.cygnus.com/ml/gdb-patches/2000-04/msg00455.html

This patch makes some vast improvements, and in itself should get rid
of all warnings.

Mark