tree 5cb48bfcdf5ee053c8d289773a298e8805f873b5
parent 6f735df0d1268cc976e5834c3cb1cc9e6fe9395d
author Greg Kaiser <gkaiser@google.com> 1568383083 -0700
committer Greg Kaiser <gkaiser@google.com> 1568383083 -0700

libsnapshot: Fix typo in nullptr check

We already know 'existing_extent' is non-null (or else we would
have crashed on the previous line).  We fix this to check
'existing_linear_extent' against nullptr.

Test: TreeHugger
Change-Id: I03338bca87d1c2bd0cbea0e1ec31244ba9570a40