Fix usage of deprecated find

src/AvatarProvider.cpp

@@ -42,7 +42,7 @@ resolve(const QString &avatarUrl, int size, QObject *receiver, AvatarCallback ca
                 return;
 
         QPixmap pixmap;
-        if (avatar_cache.find(cacheKey, pixmap)) {
+        if (avatar_cache.find(cacheKey, &pixmap)) {
                 nhlog::net()->info("cached pixmap {}", avatarUrl.toStdString());
                 callback(pixmap);
                 return;

src/ui/Avatar.h

@@ -22,7 +22,6 @@ public:
         void setImage(const QString &avatar_url);
         void setImage(const QString &room, const QString &user);
         void setLetter(const QString &letter);
-        //        void setSize(int size);
         void setTextColor(const QColor &color);
 
         QColor backgroundColor() const;