ext4: fix error handling in ext4_ext_shift_extents
ext4: fix error handling in ext4_ext_shift_extents

Fix error handling by adding some.  :-)

Signed-off-by: Dmitry Monakhov <eecfa5af1016ca9db755569d9919e212ab6a1c94@openvz.org>
Signed-off-by: "Theodore Ts'o" <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs