Fixed incorrect definition on API DbgUiSetThreadDebugObject (#387)

* Fixed incorrect definition on API DbgUiSetThreadDebugObject

DbgUiSetThreadDebugObject do not return any value, we should mark it as "void"

* Fixed the document for API DbgUiSetThreadDebugObject

PInvoke/NtDll/Winternl.cs

@@ -302,16 +302,8 @@ public static extern NTStatus NtCreateProcessEx(out HPROCESS ProcessHandle, [In]
 
 		/// <summary>Set the debug object handle in the TEB. This function is UNDOCUMENTED.</summary>
 		/// <param name="DebugObjectHandle">Debug object handle. Retrieve from NtQueryInformationProcess</param>
-		/// <returns>
-		/// <para>The function returns an NTSTATUS success or error code.</para>
-		/// <para>
-		/// The forms and significance of NTSTATUS error codes are listed in the Ntstatus.h header file available in the DDK, and are
-		/// described in the DDK documentation under Kernel-Mode Driver Architecture / Design Guide / Driver Programming Techniques /
-		/// Logging Errors.
-		/// </para>
-		/// </returns>
 		[DllImport(Lib.NtDll, SetLastError = false, ExactSpelling = true)]
-		public static extern NTStatus DbgUiSetThreadDebugObject(IntPtr DebugObjectHandle);
+		public static extern void DbgUiSetThreadDebugObject(IntPtr DebugObjectHandle);
 
 		/// <summary>Call the kernel to remove the debug object. This function is UNDOCUMENTED.</summary>
 		/// <param name="ProcessHandle">The process handle.</param>

UnitTests/PInvoke/NtDll/WinternlTests.cs

@@ -84,7 +84,7 @@ public void DbgUiSetThreadDebugObjectAndNtRemoveProcessDebugTest()
 
 				try
 				{
-					Assert.That(DbgUiSetThreadDebugObject(DebugObjectHandleQueryResult.Value), ResultIs.Successful);
+					DbgUiSetThreadDebugObject(DebugObjectHandleQueryResult.Value);
 
 					try
 					{
@@ -114,7 +114,7 @@ public void DbgUiSetThreadDebugObjectAndNtRemoveProcessDebugTest()
 					}
 					finally
 					{
-						Assert.That(DbgUiSetThreadDebugObject(IntPtr.Zero), ResultIs.Successful);
+						DbgUiSetThreadDebugObject(IntPtr.Zero);
 					}
 				}
 				finally