tsearch2 changes need backpatching?

The buildfarm member penguin (Debian, ARM) has been building the HEAD 
branch for the most part happily since late January, but keeps failing 
on the REL8_0_STABLE branch on tsearch2. It appears that some changes 
made around 24-27 January fixed it for this architecture/OS. Looking in 
the committers log, I see:


improve support of agglutinative languages (query with compound words)


and


Change
typedef struct {} WordEntryPos;
to
typedef uint16 WordEntryPos


Could one of these inadvertantly fix the problem we are seeing here? Do we need to backpatch to fix REL8_0_STABLE, or
applysome other fix?
 


cheers

andrew