UI: LoadGuestApplication asynchronous cancellation (#1)

Fixed LoadGuestApplication hanging when cancelled.
Since startup procedure has technically changed, we should consider testing this with a variety of game formats to ensure regressions do not occur.
Closes [#20](https://github.com/Ryubing/Issues/issues/20)

Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/1

src/Ryujinx.HLE/Loaders/Processes/ProcessResult.cs

@@ -4,7 +4,6 @@ using LibHac.Ns;
 using Ryujinx.Common.Logging;
 using Ryujinx.Cpu;
 using Ryujinx.HLE.HOS.SystemState;
-using Ryujinx.HLE.Loaders.Processes.Extensions;
 using Ryujinx.Horizon.Common;
 
 namespace Ryujinx.HLE.Loaders.Processes
@@ -52,6 +51,7 @@ namespace Ryujinx.HLE.Loaders.Processes
 
             if (metaLoader is not null)
             {
+                Logger.Info?.Print(LogClass.Application,$"metaLoader: {metaLoader}");
                 ulong programId = metaLoader.ProgramId;
 
                 Name = ApplicationControlProperties.Title[(int)titleLanguage].NameString.ToString();
@@ -71,8 +71,15 @@ namespace Ryujinx.HLE.Loaders.Processes
                 ProgramId = programId;
                 ProgramIdText = $"{programId:x16}";
                 Is64Bit = metaLoader.IsProgram64Bit;
+            } 
+            
+            else
+            {
+                Logger.Error?.Print(LogClass.Application,$"metaLoader is null !!!");
+                ProcessId = 0;
+                return;
             }
-
+            
             DiskCacheEnabled = diskCacheEnabled;
             AllowCodeMemoryForJit = allowCodeMemoryForJit;
         }