Index: thread/thread.c
===================================================================
--- thread/thread.c	(revision 14332)
+++ thread/thread.c	(working copy)
@@ -330,9 +330,9 @@
 BOOL STDCALL
 SwitchToThread(VOID)
 {
-  NTSTATUS errCode;
-  errCode = NtYieldExecution();
-  return TRUE;
+  NTSTATUS Status;
+  Status = NtYieldExecution();
+  return Status != STATUS_NO_YIELD_PERFORMED;
 }