tree 6b84fe2cd5ec1d6aa9a5b215179515f0a3f6b8ea
parent a0e3582ecfbac0dde182a65488a25147c1db07a6
author Wan-Teh Chang <wtc@google.com> 1558647671 -0700
committer Wan-Teh Chang <wtc@google.com> 1558647996 -0700

Do not send a NULL C-style string to std::ostream.

The res_filename field of the DecodeParam struct is a C-style string. We
allow it to be a NULL pointer. Before we send a NULL C-style string to
std::ostream, convert it to a valid C++ string. Better yet, convert it to
the default result file name.

BUG=aomedia:2282,aomedia:2396

Change-Id: I161e1268ea7cf273a70d9a7ff22044078b632038