[rediffed against pf28]
Remove ISTATUS_5_UNKNOWN and unknown0x2350.
There is no code path which actually can reach this code:
ISTATUS_5_UNKNOWN is assigned to variables only inside if()s
which check for it being assigned to another variables :)
After ISTATUS_5_UNKNOWN is removed, unknown0x2350 is unused.
Get rid of it too.
* comment out two unused automatic variables
* use VEC_SIZE(a) as appropriate
* fix whitespace breakage