ensure that ent->classname is always non-null (for entity numbers up to level.num_entities-1, and ENTITYNUM_WORLD and ENTITYNUM_NONE), for player entities and #ENTITYNUM_NONE in particular, patch by DevHC

code/game/g_main.c

@@ -466,6 +466,10 @@ void G_InitGame( int levelTime, int randomSeed, int restart ) {
 	// range are NEVER anything but clients
 	level.num_entities = MAX_CLIENTS;
 
+	for ( i=0 ; i<MAX_CLIENTS ; i++ ) {
+		g_entities[i].classname = "clientslot";
+	}
+
 	// let the server system know where the entites are
 	trap_LocateGameData( level.gentities, level.num_entities, sizeof( gentity_t ), 
 		&level.clients[0].ps, sizeof( level.clients[0] ) );