Fix IpList queries not cancelling when disposed

Facepunch.Steamworks/ServerList/Base.cs

@@ -135,7 +135,7 @@ void ReleaseQuery()
 			}
 		}
 
-		public void Dispose()
+		public virtual void Dispose()
 		{
 			ReleaseQuery();
 		}

Facepunch.Steamworks/ServerList/IpList.cs

@@ -1,9 +1,5 @@
-using Steamworks.Data;
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
 using System.Threading.Tasks;
 
 namespace Steamworks.ServerList
@@ -30,15 +26,17 @@ public override async Task<bool> RunQueryAsync( float timeoutSeconds = 10 )
 
 			var ips = Ips.ToArray();
 
-			while ( true )
+			wantsCancel = false;
+
+			while ( !wantsCancel )
 			{
-				var sublist = ips.Skip( pointer ).Take( blockSize );
-				if ( sublist.Count() == 0 )
+				var sublist = ips.Skip( pointer ).Take( blockSize ).ToList();
+				if ( sublist.Count == 0 )
 					break;
 
 				using ( var list = new ServerList.Internet() )
 				{
-					list.AddFilter( "or", sublist.Count().ToString() );
+					list.AddFilter( "or", sublist.Count.ToString() );
 
 					foreach ( var server in sublist )
 					{
@@ -47,9 +45,6 @@ public override async Task<bool> RunQueryAsync( float timeoutSeconds = 10 )
 
 					await list.RunQueryAsync( timeoutSeconds );
 
-					if ( wantsCancel )
-						return false;
-
 					Responsive.AddRange( list.Responsive );
 					Responsive = Responsive.Distinct().ToList();
 					Unresponsive.AddRange( list.Unresponsive );
@@ -64,9 +59,17 @@ public override async Task<bool> RunQueryAsync( float timeoutSeconds = 10 )
 			return true;
 		}
 
+		// note: Cancel doesn't get called in Dispose because request is always null for this class
 		public override void Cancel()
 		{
 			wantsCancel = true;
 		}
+
+		public override void Dispose()
+		{
+			base.Dispose();
+
+			wantsCancel = true;
+		}
 	}
-}
+}