Fix GetAvatar sometimes failing instead of waiting for the avatar to load

Facepunch.Steamworks/Client/Friends.cs

@@ -271,11 +271,21 @@ public void GetAvatar( AvatarSize size, ulong steamid, Action<Image> callback )
             // Lets request it from Steam
             if (!client.native.friends.RequestUserInformation(steamid, false))
             {
-                // Steam told us to get fucked
+                // from docs: false means that we already have all the details about that user, and functions that require this information can be used immediately
-                callback(null);
+                // but that's probably not true because we just checked the cache
+
+                // check again in case it was just a race
+                image = GetCachedAvatar(size, steamid);
+                if ( image != null )
+                {
+                    callback(image);
                     return;
                 }
 
+                // maybe Steam returns false if it was already requested? just add another callback and hope it comes
+                // if not it'll time out anyway
+            }
+
             PersonaCallbacks.Add( new PersonaCallback
             {
                 SteamId = steamid,
@@ -326,7 +336,10 @@ internal void Cycle()
                 {
                     if ( cb.Callback != null )
                     {
-                        cb.Callback( null );
+                        // final attempt, will be null unless the callback was missed somehow
+                        var image = GetCachedAvatar( cb.Size, cb.SteamId );
+
+                        cb.Callback( image );
                     }
 
                     PersonaCallbacks.Remove( cb );