Fix a NULL deref in libsvn_repos which makes svndumpfilter crash. * subversion/libsvn_repos/dump.c (svn_repos__dump_revision_record): Don't try to print a Content-length header if propstring is NULL. Reported by: Steven Barbaglia https://svn.haxx.se/users/archive-2017-02/0012.shtml
subversion/trunk/subversion/libsvn_repos/dump.c