ext4: don't dereference null pointer when make_indexed_dir() fails
ext4: don't dereference null pointer when make_indexed_dir() fails

Fix for a null pointer bug found while running punch hole tests

Signed-off-by: Allison Henderson <f908fb55b00b5234257aee48327eaf34b75167a0@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas