be quiet if there is no 'warn' file
be quiet if there is no 'warn' file

Change-Id: I44ce29c41c914c57e5c0e4036e327447efb5b26b

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