Build break - vfs_syscalls

[Paul Goyette <paul%whooppee.com@localhost>]

#   compile  librumpvfs/vfs_syscalls.o
/test-bed/tools/bin/x86_64--netbsd-gcc -O2 -ffreestanding 
-fno-strict-aliasing -Wsign-compare -Wno-pointer-sign -Wno-attributes 
-std=gnu99 -mno-red-zone -std=gnu99  -Wall -Wstrict-prototypes 
-Wmissing-prototypes -Wpointer-arith -Wno-sign-compare  -Wno-traditional 
-Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual 
-Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare -Werror 
-Wno-format-zero-length -Wno-pointer-sign   -fstack-protector 
-Wstack-protector   --param ssp-buffer-size=1   --sysroot=/test-bed/dst 
-D_RUMP_NATIVE_ABI -D_KERNEL -DMULTIPROCESSOR -D_MODULE -DMODULAR 
-DMAXUSERS=32 -DDIAGNOSTIC -DCOMPAT_50=1 -DDEBUGPRINT 
-I/test-bed/src/lib/librumpvfs -I. 
-I/test-bed/src/lib/librumpvfs/../../sys/rump/../../common/include 
-isystem /test-bed/src/lib/librumpvfs/../../sys/rump/../arch 
-I/test-bed/src/lib/librumpvfs/../../sys/rump/include 
-I/test-bed/src/lib/librumpvfs/../../sys/rump/librump/rumpkern/opt 
-nostdinc -isystem /test-bed/src/lib/librumpvfs/../../sys/rump/.. 
-D__NetBSD__ 
-I/test-bed/src/lib/librumpvfs/../../sys/rump/librump/rumpkern  -c 
/test-bed/src/lib/librumpvfs/../../sys/rump/../kern/vfs_syscalls.c -o 
vfs_syscalls.o
cc1: warnings being treated as errors
/test-bed/src/lib/librumpvfs/../../sys/rump/../kern/vfs_syscalls.c: In 
function 'do_sys_rename':
/test-bed/src/lib/librumpvfs/../../sys/rump/../kern/vfs_syscalls.c:3153: 
warning: unused variable 'l'

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