Return 0 when the version string can not be properly parsed.
Return 0 when the version string can not be properly parsed.

ksophocleous/libsrtp,ksophocleous/libsrtp,yarrcc/libsrtp-ios,persmule/libsrtp,cuijinquan/libsrtp,yarrcc/libsrtp-ios,cuijinquan/libsrtp,cuijinquan/libsrtp,persmule/libsrtp,yarrcc/libsrtp-ios,persmule/libsrtp