gjournal compilation failure

[Igor Robul]

Hello, 

I have just tried to compile world with latest gjournal patch, and I got

cc -pipe -O2  -I/usr/src/sbin/fsck_ffs -DRESCUE -Wsystem-headers -Werror
-Wall -Wno-format-y2k -Wno-uninitialized -c
/usr/src/sbin/fsck_ffs/gjournal.c
/usr/src/sbin/fsck_ffs/gjournal.c: In function `gjournal_check':
/usr/src/sbin/fsck_ffs/gjournal.c:717: warning: dereferencing
type-punned pointer will break strict-aliasing rules
*** Error code 1