Do not move nCurUndoAction < 0.
Do not move nCurUndoAction < 0.

(Could easily happen when max undo steps is set to 1.)

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core