Fix warnings found by chl@ and djm@ and change roaming_atomicio's
return type to match atomicio's
Diff from djm@, ok markus@
+ - andreas@cvs.openbsd.org 2009/06/12 20:58:32
+ [packet.c]
+ Move some more statics into session_state
+ ok markus@ djm@
20090616
- (dtucker) [configure.ac defines.h] Bug #1607: handle the case where fsid_t