- (dtucker) [openbsd-compat/setproctitle.c] Ensure SPT_TYPE is defined before

 - (dtucker) [openbsd-compat/setproctitle.c] Ensure SPT_TYPE is defined before
   testing its value.

When HAVE_SETPROCTITLE is defined (at least on NetBSD, gcc 2.95.3) the test
"#if SPT_TYPE == SPT_REUSEARGV" is not true (probably because SPT_TYPE or
SPT_REUSEARGV is not defined).  This results in the following build error:

$ gcc [flags] setproctitle.c
setproctitle.c: In function `compat_init_setproctitle':
setproctitle.c:102: `argv_start' undeclared (first use in this function)