The sigpause function in glibc is the XPG version, not the BSD
version.  But the signal mask is set by the immediately following
sigsetmask function anyway, so remove the sigpause function call.

This avoids an implicit function declaration and build failures with
future compilers.

diff -ur bsd-games-2.17.orig/hunt/hunt/otto.c bsd-games-2.17/hunt/hunt/otto.c
--- bsd-games-2.17.orig/hunt/hunt/otto.c	2004-12-07 14:34:21.000000000 +0100
+++ bsd-games-2.17/hunt/hunt/otto.c	2023-02-05 17:58:11.266200099 +0100
@@ -178,7 +178,6 @@
 	(void) signal(SIGALRM, nothing);
 	old_mask = sigblock(sigmask(SIGALRM));
 	setitimer(ITIMER_REAL, &pause_time, NULL);
-	sigpause(old_mask);
 	sigsetmask(old_mask);
 
 	/* save away parameters so other functions may use/update info */