From efe76a6647977fd53c279689b29ce8244a64df79 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Mon, 12 Apr 2021 16:32:42 +0200
Subject: [PATCH] - Blood: fixed crash with badly defined drop objects.

Got -1 for picnum there, this was causing crashes.
---
 source/games/blood/src/actor.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/source/games/blood/src/actor.cpp b/source/games/blood/src/actor.cpp
index 1ffdd1d79..364373526 100644
--- a/source/games/blood/src/actor.cpp
+++ b/source/games/blood/src/actor.cpp
@@ -2854,7 +2854,12 @@ spritetype *actDropObject(spritetype *pSprite, int nType) {
     else if (nType >= kItemAmmoBase && nType < kItemAmmoMax) pSprite2 = actDropAmmo(pSprite, nType);
     else if (nType >= kItemWeaponBase && nType < kItemWeaponMax) pSprite2 = actDropWeapon(pSprite, nType);
     
-    if (pSprite2 && pSprite->picnum > -1) {
+    if (pSprite2) {
+        if (pSprite2->picnum == -1)
+        {
+            DeleteSprite(pSprite2 - sprite);
+            return nullptr;
+        }
         int top, bottom;
         GetSpriteExtents(pSprite2, &top, &bottom);
         if (bottom >= pSprite2->z)