fix memory leak cisco/cjose#72; thanks @BilalChughtai (#73)
fix memory leak cisco/cjose#72; thanks @BilalChughtai (#73)

fix memory leak when cjose_jws_verify is called second time on same jws

Signed-off-by: Hans Zandbelt <ed0aee6a22215d4e183b63ab4a45da7fb897917a@zmartzone.eu>
zandbelt/cjose,linuxwolf/cjose,linuxwolf/cjose,zandbelt/cjose,zandbelt/cjose,linuxwolf/cjose