real assert() to bail out on invalid index
real assert() to bail out on invalid index

... instead of displaying a message and then silently poking memory that
we don't own. Now that globstr.hrc is renumbered it makes sense to
prevent future inconsistencies.

Change-Id: I7458fbca4928b33fc7471820aeea7882a0f71e50

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