Add inline comments for iOS locals

osu.Game/Beatmaps/BeatmapImporter.cs

@@ -198,6 +198,7 @@ namespace osu.Game.Beatmaps
 
             if (beatmapSet.OnlineID > 0)
             {
+                // Required local for iOS. Will cause runtime crash if inlined.
                 int onlineId = beatmapSet.OnlineID;
 
                 // OnlineID should really be unique, but to avoid catastrophic failure let's iterate just to be sure.

osu.Game/Online/BeatmapDownloadTracker.cs

@@ -40,6 +40,7 @@ namespace osu.Game.Online
             // Used to interact with manager classes that don't support interface types. Will eventually be replaced.
             var beatmapSetInfo = new BeatmapSetInfo { OnlineID = TrackedItem.OnlineID };
 
+            // Required local for iOS. Will cause runtime crash if inlined.
             int onlineId = TrackedItem.OnlineID;
 
             realmSubscription = realm.RegisterForNotifications(r => r.All<BeatmapSetInfo>().Where(s => s.OnlineID == onlineId && !s.DeletePending), (items, _) =>

osu.Game/Online/ScoreDownloadTracker.cs

@@ -46,6 +46,7 @@ namespace osu.Game.Online
             Downloader.DownloadBegan += downloadBegan;
             Downloader.DownloadFailed += downloadFailed;
 
+            // Required local for iOS. Will cause runtime crash if inlined.
             long onlineId = TrackedItem.OnlineID;
             long legacyOnlineId = TrackedItem.LegacyOnlineID;
             string hash = TrackedItem.Hash;

osu.Game/Skinning/RealmBackedResourceStore.cs

@@ -29,6 +29,7 @@ namespace osu.Game.Skinning
             invalidateCache();
             Debug.Assert(fileToStoragePathMapping != null);
 
+            // Required local for iOS. Will cause runtime crash if inlined.
             Guid id = source.ID;
 
             realmSubscription = realm?.RegisterForNotifications(r => r.All<T>().Where(s => s.ID == id), skinChanged);

osu.Game/Skinning/SkinManager.cs

@@ -131,6 +131,7 @@ namespace osu.Game.Skinning
         {
             Realm.Run(r =>
             {
+                // Required local for iOS. Will cause runtime crash if inlined.
                 Guid currentSkinId = CurrentSkinInfo.Value.ID;
 
                 // choose from only user skins, removing the current selection to ensure a new one is chosen.