Fix crash when +USEing NPCs that have just exited a scripted sequence

Author: SamVanheer

CHANGELOG.md

@@ -19,6 +19,7 @@
 * Fixed save game system not saving arrays of EHANDLEs if the first half of the array contains null handles (mainly affected Nihilanth's spheres) [#224](https://github.com/SamVanheer/halflife-updated/issues/224) (Thanks Ronin4862)
 * Fixed player gaining health when drowning with god mode enabled and recovering health after surfacing (Thanks malortie)
 * Fixed human grunts continuing to fire for a few seconds after killing the last enemy in an area [Opposing Force Updated #100](https://github.com/SamVanheer/halflife-op4-updated/issues/100) (Thanks Ronin4862 and malortie)
+* Fixed crash when +USEing NPCs that have just exited a scripted sequence (Thanks malortie)
 
 ### Features
 

dlls/talkmonster.cpp

@@ -1381,7 +1381,10 @@ bool CTalkMonster::CanFollow()
 {
 	if (m_MonsterState == MONSTERSTATE_SCRIPT || m_IdealMonsterState == MONSTERSTATE_SCRIPT)
 	{
-		if (!m_pCine->CanInterrupt())
+		// It's possible for m_MonsterState to still be MONSTERSTATE_SCRIPT when the script has already ended.
+		// We'll treat a null pointer as an uninterruptable script and wait for the NPC to change states
+		// before allowing players to make them follow them again.
+		if (!m_pCine || !m_pCine->CanInterrupt())
 			return false;
 	}