correct flag for file opening
correct flag for file opening

Although it seems reading works even when opened just for write ...

Change-Id: I57039e7b72dd466e1b087c81377b2b2dcd26fb5c

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