game/server: fix some Asan issues

game/server/ai_behavior_follow.cpp

@@ -111,7 +111,7 @@ public:
 		else
 		{
 			int result = 0;
-			for ( int i = pGroup->followers.Head(); i != pGroup->followers.InvalidIndex(); i = pGroup->followers.Next( i ) )
+			for ( intp i = pGroup->followers.Head(); i != pGroup->followers.InvalidIndex(); i = pGroup->followers.Next( i ) )
 			{
 				if ( pGroup->followers[i].hFollower && pGroup->followers[i].hFollower->ClassMatches( iszClassname ) )
 				{
@@ -131,7 +131,7 @@ public:
 			return 0;
 		}
 
-		int h = pGroup->followers.Head();
+		intp h = pGroup->followers.Head();
 
 		while( h != pGroup->followers.InvalidIndex() )
 		{

game/server/ai_network.cpp

@@ -120,6 +120,8 @@ CAI_Network::CAI_Network()
 #ifdef AI_NODE_TREE
 	m_pNodeTree = NULL;
 #endif
+
+	gEntList.AddListenerEntity( this );
 }
 
 //-----------------------------------------------------------------------------
@@ -133,6 +135,9 @@ CAI_Network::~CAI_Network()
 		m_pNodeTree = NULL;
 	}
 #endif
+
+	gEntList.RemoveListenerEntity( this );
+
 	if ( m_pAInode )
 	{
 		for ( int node = 0; node < m_iNumNodes; node++ )
@@ -642,3 +647,22 @@ IterationRetval_t CAI_Network::EnumElement( IHandleEntity *pHandleEntity )
 }
 
 //=============================================================================
+
+void CAI_Network::OnEntityDeleted( CBaseEntity *pEntity )
+{
+	if( pEntity->IsNPC() )
+		return;
+
+	const char *classname = pEntity->GetClassname();
+	if( !classname || strcmp(classname, "ai_hint") != 0 )
+		return;
+
+	for( int i = 0; i < m_iNumNodes; i++)
+	{
+		if(  m_pAInode[i]->GetHint() == (CAI_Hint*)pEntity )
+		{
+			m_pAInode[i]->SetHint( NULL );
+			break;
+		}
+	}
+}

game/server/ai_network.h

@@ -84,12 +84,14 @@ public:
 // Purpose: Stores a node graph through which an AI may pathfind
 //-----------------------------------------------------------------------------
 
-class CAI_Network : public IPartitionEnumerator
+class CAI_Network : public IPartitionEnumerator, public IEntityListener
 {
 public:
 	CAI_Network();
 	~CAI_Network();
 
+	void OnEntityDeleted( CBaseEntity *pEntity );
+
 	CAI_Node *		AddNode( const Vector &origin, float yaw );						// Returns a new node in the network
 	CAI_Link *		CreateLink( int srcID, int destID, CAI_DynamicLink *pDynamicLink = NULL );
 
@@ -128,6 +130,8 @@ public:
 	
 	CAI_Node**		AccessNodes() const	{ return m_pAInode; }
 	
+
+	
 private:
 	friend class CAI_NetworkManager;
 

tier1/strtools.cpp

@@ -2019,6 +2019,9 @@ bool V_StripLastDir( char *dirName, int maxlen )
 //-----------------------------------------------------------------------------
 const char * V_UnqualifiedFileName( const char * in )
 {
+	if( !in || !in[0] )
+		return in;
+
 	// back up until the character after the first path separator we find,
 	// or the beginning of the string
 	const char * out = in + strlen( in ) - 1;