Related: fdo#66440 RTF export: handle NULL component in FlyFrameOLEMath()
Related: fdo#66440 RTF export: handle NULL component in FlyFrameOLEMath()

No testcase, for some reason the bugdoc doesn't crash in
CppunitTest_sw_filters_test, but it does using './soffice --headless
--convert-to'. But anyway, it's just a NULL pointer check.

Change-Id: I21325a4df45b3b9bcd43d0a8eb57d45b3ab7397c

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