From e8d8e67b56b1214a648a89f0b6d5db26c3c2824f Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@zdoom.fake>
Date: Sun, 12 May 2013 18:36:03 +0000
Subject: [PATCH] - Fixed possible NULL pointer deref in
 P_SpawnPlayerMissile().

SVN r4257 (trunk)
---
 src/p_mobj.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index c22430af2..a6391a71b 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -5634,7 +5634,11 @@ AActor *P_SpawnPlayerMissile (AActor *source, fixed_t x, fixed_t y, fixed_t z,
 	AActor *defaultobject = GetDefaultByType(type);
 	int vrange = nofreeaim ? ANGLE_1*35 : 0;
 
-	if (source && source->player && source->player->ReadyWeapon && (source->player->ReadyWeapon->WeaponFlags & WIF_NOAUTOAIM))
+	if (source == NULL)
+	{
+		return NULL;
+	}
+	if (source->player && source->player->ReadyWeapon && (source->player->ReadyWeapon->WeaponFlags & WIF_NOAUTOAIM))
 	{
 		// Keep exactly the same angle and pitch as the player's own aim
 		an = angle;