fix html export of line spacing
fix html export of line spacing

regression from 84931eb8aeeb55a2570edb24f5c2d3409f9c2398

Change-Id: Ifcedcd34721a1ca162495f57ad36cfc6859ab0c4

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