cam_periph.c compilation errors on the -CURRENT

Good day.

Today's CURRENT, i386 arch.  Got signedness warnings that were
transferred to errors because of compilation flags:
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cc -c -O2 -pipe -fno-strict-aliasing -march=pentium3 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -fformat-extensions -std=c99  -nostdinc -I-  -I. -I../../.. -I../../../contrib/altq -I../../../contrib/ipfilter -I../../../contrib/pf -I../../../dev/ath -I../../../contrib/ngatm -I../../../dev/twa -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -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  -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -ffreestanding -Werror  ../../../cam/cam_periph.c
cc1: note: obsolete option -I- used, please use -iquote instead
cc1: warnings being treated as errors
../../../cam/cam_periph.c: In function 'cam_periph_mapmem':
../../../cam/cam_periph.c:651: warning: pointer targets in assignment differ in signedness
../../../cam/cam_periph.c:679: warning: pointer targets in assignment differ in signedness
*** Error code 1
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Not very familiar with the cam subsystem, so can not judge what will
be the right way to fix this.
-- 
Eygene