fs/befs/linuxvfs.c:befs_iget(): remove unneeded initialization to NULL

bh is reinitialized by befs_bread() so no need to init it
with NULL in the beginning of befs_iget()

Link: http://lkml.kernel.org/r/38d62b1469bc3b316ba6b81fd8e26fc66fdd713b.1462842886.git.salah.triki@acm.org


Signed-off-by: Salah Triki <salah.triki@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>