6609 NULL pointer constant issues under uts/intel

updated review since cstyle updates and rebase to a recent upstream (illumos-gate/master).
mail_msg and wsdiff (of cumulated build of il_6609, il_6610 and il_6611... respectively r/129, r/130 and r/131)

shows no significant differences (file attached).
NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .rodata difference detected.

NOTE: ELF .rodata difference detected.

NOTE: ELF .SUNW_dof difference detected.

NOTE: ELF .rodata difference detected.

NOTE: ELF .rodata difference detected.

NOTE: ELF .rodata difference detected.

NOTE: ELF .data difference detected.

NOTE: ELF .data difference detected.

NOTE: ELF .text difference detected.

NOTE: ELF .data difference detected.

NOTE: ELF .data difference detected.

NOTE: ASCII difference detected.
the SUNW_dof, .[ro]data and ASCII differences are related to the branch name and datetime stamps.

the only code difference (.text) is due to two source code lines being suppressed as detailed in

r/131 concerning usr/src/uts/i86pc/io/dr/dr.c
Although I had long run a version of the gate with these mods, I have not done so recently

waiting for a perl64 enabled patchset to push since I run basically on omnios-bloody.