SVN r255467 breaks kernel build on -current

[Michael Butler]

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GCC complains about two uninitialized variables:


*** sys/kern/uipc_syscalls.c~   Wed Sep 11 07:52:16 2013
- --- sys/kern/uipc_syscalls.c    Wed Sep 11 08:29:43 2013
***************
*** 2189,2199 ****
        struct socket *so;
        struct mbuf *m;
        struct sf_buf *sf;
!       struct vm_page *pg;
        struct shmfd *shmfd;
        struct sendfile_sync *sfs;
        struct vattr va;
!       off_t off, xfsize, fsbytes, sbytes, rem, obj_size;
        int error, bsize, nd, hdrlen, mnw;
        bool inflight_called;

- --- 2189,2199 ----
        struct socket *so;
        struct mbuf *m;
        struct sf_buf *sf;
!       struct vm_page *pg = NULL;
        struct shmfd *shmfd;
        struct sendfile_sync *sfs;
        struct vattr va;
!       off_t off, xfsize, fsbytes, sbytes, rem, obj_size = 0;
        int error, bsize, nd, hdrlen, mnw;
        bool inflight_called;

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