sdtid: Fix valgrind errors in replace_b64()
sdtid: Fix valgrind errors in replace_b64()

We actually need to allocate one more byte than BASE64_INPUT_LEN()
specifies, because of the '=' hack on <Seed>.

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

mtmiller/stoken,cernekee/stoken,mtmiller/stoken,cernekee/stoken,cernekee/stoken,cernekee/stoken,mtmiller/stoken,mtmiller/stoken