Merge "Benign integer overflow in PlaylistFetcher"

    if (mSegmentFirstPTS < 0ll) {

        // get the smallest first PTS from all streams present in this parser

        for (size_t i = mPacketSources.size(); i-- > 0;) {

        for (size_t i = mPacketSources.size(); i > 0;) {

            i--;

            const LiveSession::StreamType stream = mPacketSources.keyAt(i);

            if (stream == LiveSession::STREAMTYPE_SUBTITLES) {

                ALOGE("MPEG2 Transport streams do not contain subtitles.");