From 1372d0f6b042010ba5aa2c681b411249c30255f6 Mon Sep 17 00:00:00 2001
From: Anders Jenbo <anders@jenbo.dk>
Date: Fri, 29 Nov 2019 01:15:35 +0100
Subject: [PATCH] Update themes.cpp

---
 Source/themes.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/themes.cpp b/Source/themes.cpp
index 173c998c6..2453e3179 100644
--- a/Source/themes.cpp
+++ b/Source/themes.cpp
@@ -721,7 +721,7 @@ void Theme_Library(int t)
 		for (xp = 1; xp < MAXDUNX - 1; xp++) {
 			if (CheckThemeObj3(xp, yp, t, -1) && dMonster[xp][yp] == 0 && random_(0, librnd[leveltype - 1]) == 0) {
 				AddObject(OBJ_BOOKSTAND, xp, yp);
-				if (random_(0, 2 * librnd[leveltype - 1]) != 0) {
+				if (random_(0, 2 * librnd[leveltype - 1]) != 0) { /// BUGFIX: check dObject[xp][yp] was populated by AddObject
 					oi = dObject[xp][yp] - 1;
 					object[oi]._oSelFlag = 0;
 					object[oi]._oAnimFrame += 2;