n#325936 fix ww8 export of fly frames with transparent background in headers
n#325936 fix ww8 export of fly frames with transparent background in headers

Regression from commit ed8b5f2d -- to be safe, reverted only for fly
frames in headers.

Change-Id: Ia538b69bb913567c7d087d40afc7f0a141b7a0ed

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