Fix incorrect passing of a char pointer which gets converted to bool
Fix incorrect passing of a char pointer which gets converted to bool

Revealed by a warning from our Clang plug-in: "pointer 'const char *'
implicitly converted to bool [loplugin]"

I love --enable-werror and loplugin.

Change-Id: Iece0bda4325cd1e5d1333affffef12396e5dfb7d

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