WIN just wait for the Yield mutex in the timerout

Don't re-schedule a timeout, simply wait in the timer callback.

Change-Id: Ib46eb6dbf57f29c85ffdbd6492922020f7785d30

vcl/win/app/saltimer.cxx

@@ -154,16 +154,9 @@ void EmitTimerCallback()
     if ( ! pSVData->maSchedCtx.mpSalTimer )
         return;
 
-    // Try to acquire the mutex. If we don't get the mutex then we
-    // try this a short time later again.
-    if (ImplSalYieldMutexTryToAcquire())
-    {
-        pSVData->maSchedCtx.mpSalTimer->CallCallback();
-
-        ImplSalYieldMutexRelease();
-    }
-    else
-        ImplSalStartTimer( 10 );
+    ImplSalYieldMutexAcquireWithWait();
+    pSVData->maSchedCtx.mpSalTimer->CallCallback();
+    ImplSalYieldMutexRelease();
 }
 
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