From 27c29894a77a0733085b3901297a64773069c61a Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Sat, 30 Mar 2019 20:52:43 +0900
Subject: User::nameForRoom(): null hint is not a hint

This caused the library to erroneously believe that users with no
representation in other rooms have no display name even if that display
name is provided for the given room.
---
 lib/user.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/user.cpp b/lib/user.cpp
index c373a067..951ad87d 100644
--- a/lib/user.cpp
+++ b/lib/user.cpp
@@ -82,7 +82,8 @@ class User::Private
 QString User::Private::nameForRoom(const Room* r, const QString& hint) const
 {
     // If the hint is accurate, this function is O(1) instead of O(n)
-    if (hint == mostUsedName || otherNames.contains(hint, r))
+    if (!hint.isNull()
+            && (hint == mostUsedName || otherNames.contains(hint, r)))
         return hint;
     return otherNames.key(r, mostUsedName);
 }
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