fix compile failed.
fix compile failed.

avplus/srs,tribbiani/srs,ossrs/srs,winlinvip/srs,tribbiani/srs,icevl/srs,winlinvip/simple-rtmp-server,ossrs/srs,tribbiani/srs,winlinvip/srs,tribbiani/srs,icevl/srs,winlinvip/srs,avplus/srs,ossrs/srs,tribbiani/srs,winlinvip/srs,icevl/srs,avplus/srs,winlinvip/srs,icevl/srs,tribbiani/srs,ossrs/srs,icevl/srs,avplus/srs,ossrs/srs,winlinvip/srs,avplus/srs,icevl/srs,tribbiani/srs,avplus/srs,avplus/srs,ossrs/srs