Avoid undefined behavior (and crashing) within svn_fs_x__get_changes when there are no changes and changes container caches. Caches in fs_x_data_t are optional by design: [[[ /* Private (non-shared) FSX-specific data for each svn_fs_t object. Any caches in here may be NULL. */ ]]] Follow-up to r1508041. * subversion/libsvn_fs_x/cached_data.c (svn_fs_x__get_changes): Avoid possible uninitialized variable access by setting FOUND to FALSE in case we do not have CHANGES_CACHE and CHANGES_CONTAINER_CACHE. Patch by: Evgeny Kotkov