Fixes infinite loop in bitrunning (#79194)

## About The Pull Request
Clears up some functionality in netpod disconnect cases that lead to an
infinite loop

Also fixes an errant message from #78959
## Why It's Good For The Game
Fixes #79190

## Changelog
🆑
fix: Entering a virtual domain should no longer give you a message that
it doesn't forbid items
/🆑

---------

Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>

code/modules/bitrunning/server/obj_generation.dm

@@ -85,7 +85,8 @@
 	if(domain_forbids_spells)
 		import_ban += "imported_abilities"
 		disk_ban += "powers"
-	if(import_ban)
+
+	if(length(import_ban))
 		to_chat(neo, span_warning("This domain forbids the use of [english_list(import_ban)], your disk [english_list(disk_ban)] will not be granted!"))
 
 	var/failed = FALSE