server: fix crash when m_pCurrentPathTarget is null

game/server/ai_trackpather.cpp

@@ -1026,6 +1026,9 @@ void CAI_TrackPather::UpdateCurrentTargetLeading()
 	bool bRestingAtDest = false;
 	CPathTrack *pAdjustedDest;
 
+	if( !m_pCurrentPathTarget )
+		return;
+
 	// Find the point along the line that we're closest to.
 	const Vector &vecTarget = m_pCurrentPathTarget->GetAbsOrigin();
 	Vector vecPoint;