From d97a49ffd8cfc757bdbe2b5b0194f1243ba33ebf Mon Sep 17 00:00:00 2001
From: Thorvald Natvig <slicer@users.sourceforge.net>
Date: Mon, 19 Oct 2009 23:18:14 +0200
Subject: [PATCH] Check if name is already in use before allowing a rename

---
 src/murmur/ServerDB.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/murmur/ServerDB.cpp b/src/murmur/ServerDB.cpp
index 8703f7621..840ddb742 100644
--- a/src/murmur/ServerDB.cpp
+++ b/src/murmur/ServerDB.cpp
@@ -830,6 +830,9 @@ bool Server::setInfo(int id, const QMap<int, QString> &setinfo) {
 	QMap<int, QString> info = setinfo;
 
 	if (info.contains(ServerDB::User_Name)) {
+		const QString &uname = info.value(ServerDB::User_Name);
+		if (uname.isEmpty() || (getUserID(uname) >= 0))
+			return false;
 		qhUserIDCache.remove(qhUserNameCache.value(id));
 		qhUserNameCache.remove(id);
 		qhUserIDCache.remove(info.value(ServerDB::User_Name));