K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2011-09-30T05:17:57.468279Z
K 7
svn:log
V 476
Fix a corner case in the HAL debugging changes, where ah was NULL.

Although I tried to fix this earlier by introducing HALDEBUG_G(), it
turns out there seem to be other cases where the pointer value is still
NULL.

* Fix DO_HALDEBUG() and the HALDEBUG macro to check whether ah is NULL
  before deferencing it
* Remove HALDEBUG_G() as it's no longer needed

This is hopefully a merge candidate for 9.0-RELEASE as enabling
debugging at startup could result in a kernel panic.

END