eliminate errors about unused results in block/vpc.c
These errors come up when compiling with gcc-4.3.3 and some older headers: /scratch/froydnj/qemu.git/block/vpc.c: In function 'vpc_create': /scratch/froydnj/qemu.git/block/vpc.c:514: error: value computed is not used /scratch/froydnj/qemu.git/block/vpc.c:516: error: value computed is not used /scratch/froydnj/qemu.git/block/vpc.c:517: error: value computed is not used /scratch/froydnj/qemu.git/block/vpc.c:566: error: value computed is not used Use memcpy to copy the strings instead of strncpy. Signed-off-by: NNathan Froyd <froydnj@codesourcery.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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