From 477eae335f9e589e862749b2dc04a047aae56345 Mon Sep 17 00:00:00 2001
From: Justin Flude <jflude@users.noreply.github.com>
Date: Sun, 30 Jan 2022 15:40:58 -0600
Subject: [PATCH] Fix bs & quiz error, dab warning on macOS 10.15.7 (and
 perhaps later)

---
 bs/bs.c      | 2 +-
 dab/player.h | 1 +
 quiz/quiz.c  | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/bs/bs.c b/bs/bs.c
index 98c25fd..0c6df74 100644
--- a/bs/bs.c
+++ b/bs/bs.c
@@ -191,7 +191,7 @@ intro(void)
     if(signal(SIGQUIT,SIG_IGN) != SIG_IGN)
 		signal(SIGQUIT,sighandler);
 
-    if(tmpname != '\0') {
+    if(tmpname != NULL) {
 		strcpy(name,tmpname);
 		name[0] = toupper(name[0]);
     } else {
diff --git a/dab/player.h b/dab/player.h
index 514b9b7..7233d2a 100644
--- a/dab/player.h
+++ b/dab/player.h
@@ -49,6 +49,7 @@ class BOARD;
 class PLAYER {
   public:
     PLAYER(char who);
+    virtual ~PLAYER() {}
     virtual void play(const BOARD& b, size_t& y, size_t& x, int& dir) = 0;
 
     // Helper functions
diff --git a/quiz/quiz.c b/quiz/quiz.c
index a98d19f..693cadf 100644
--- a/quiz/quiz.c
+++ b/quiz/quiz.c
@@ -155,7 +155,7 @@ show_index(void)
 		for (s = next_cat(qp->q_text); s; s = next_cat(s)) {
 			if (!rxp_compile(s))
 				err("%s", rxperr);
-			if ((p = rxp_expand()) != '\0')
+			if ((p = rxp_expand()) != NULL)
 				(void)fprintf(pf, "%s ", p);
 		}
 		(void)fprintf(pf, "\n");