fuse: fix for missing ll_ref on create

fuse: fix for missing ll_ref on create

when the 'Inode **outp' argument was added to ll_create(), it was
changed to only take the ll_ref if outp was not NULL. fuse_ll_create()
was calling ll_create() with outp=NULL, and subsequently calling
fuse_reply_create() (which causes fuse to increment the lookup count)
without registering the initial ll_ref

this patch adds a dummy inode pointer i2 to the ll_create() call to
claim our initial reference

Signed-off-by: Casey Bodley <casey@linuxbox.com>