Fix the error of pps statistics (#2820)
Fix the error of pps statistics (#2820)


ossrs/srs,winlinvip/srs,winlinvip/simple-rtmp-server,winlinvip/srs,winlinvip/srs,ossrs/srs,ossrs/srs,ossrs/srs,ossrs/srs,winlinvip/srs,winlinvip/srs,ossrs/srs,winlinvip/srs