jobs.c: apply patch from deraadt@o:

│remember to restore errno (ie. stop someone from making a mistake later)
│ok guenther
check.t, sh.h: bump vsn

I wonder though why errno must be restored even if nothing was
called after reading it… moid?

sh.h

@@ -148,9 +148,9 @@
 #endif
 
 #ifdef EXTERN
-__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.370 2009/12/12 22:27:09 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.371 2009/12/31 14:05:44 tg Exp $");
 #endif
-#define MKSH_VERSION "R39 2009/12/12"
+#define MKSH_VERSION "R39 2009/12/31"
 
 #ifndef MKSH_INCLUDES_ONLY