eisaconf.c problem in buildkernel

I'm updating a system running -CURRENT from July 23. I get this error in 
buildkernel:

cc -c -O -pipe -march=athlon-xp -Wall -Wredundant-decls -Wnested-externs 
-Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline 
-Wcast-qual  -fformat-extensions -std=c99  -nostdinc -I-  -I. -I/usr/src/sys 
-I/usr/src/sys/contrib/dev/acpica -I/usr/src/sys/contrib/altq 
-I/usr/src/sys/contrib/ipfilter -I/usr/src/sys/contrib/pf 
-I/usr/src/sys/contrib/dev/ath -I/usr/src/sys/contrib/dev/ath/freebsd 
-I/usr/src/sys/contrib/ngatm -D_KERNEL -include opt_global.h -fno-common 
-finline-limit=8000 --param inline-unit-growth=100 --param 
large-function-growth=1000  -mno-align-long-strings 
-mpreferred-stack-boundary=2 -ffreestanding 
-Werror  /usr/src/sys/dev/eisa/eisaconf.c
/usr/src/sys/dev/eisa/eisaconf.c: In function `eisa_probe':
/usr/src/sys/dev/eisa/eisaconf.c:156: warning: 'i' might be used uninitialized 
in this function
*** Error code 1

Stop in /usr/obj/usr/src/sys/YGGDRASIL.

I recvsup'd but nothing has changed except something in acpi. Could this be 
due to the GCC change, or is it actually a problem?

-David