Use gcc -ansi -pedantic in 9c.  Fix many non-C89-isms.
diff --git a/src/cmd/acid/proc.c b/src/cmd/acid/proc.c
index 034af99..e6efc95 100644
--- a/src/cmd/acid/proc.c
+++ b/src/cmd/acid/proc.c
@@ -202,7 +202,7 @@
 	for(i = 0; i < Maxproc; i++) {
 		if(ptab[i].pid == pid) {
 			detachproc(pid);
-			// close(ptab[i].ctl);
+			/* close(ptab[i].ctl); */
 			ptab[i].pid = 0;
 			s = look("proclist");
 			d = &s->v->store.u.l;