user32: Stub for LockWorkStation.

dlls/user32/user32.spec

@@ -475,7 +475,7 @@
 @ stdcall LockSetForegroundWindow (long)
 @ stub LockWindowStation
 @ stdcall LockWindowUpdate(long)
-@ stub LockWorkStation
+@ stdcall LockWorkStation()
 @ stdcall LookupIconIdFromDirectory(ptr long)
 @ stdcall LookupIconIdFromDirectoryEx(ptr long long long long)
 @ stub MBToWCSEx

dlls/user32/user_main.c

@@ -391,6 +391,16 @@ BOOL WINAPI ExitWindowsEx( UINT flags, DWORD reason )
 }
 
 /***********************************************************************
+ *		LockWorkStation (USER32.@)
+ */
+BOOL WINAPI LockWorkStation(void)
+{
+    TRACE(": stub\n");
+    SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
+    return FALSE;
+}
+
+/***********************************************************************
  *		RegisterServicesProcess (USER32.@)
  */
 int WINAPI RegisterServicesProcess(DWORD ServicesProcessId)