[fix] rtmp: panic in SetChunkSize msg

[jaesung9507]

panic: runtime error: index out of range [3] with length 0

goroutine 115834580 [running]:
encoding/binary.bigEndian.Uint32(...)
        /usr/local/go/src/encoding/binary/binary.go:157
github.com/q191201771/naza/pkg/bele.BeUint32(...)
        /home/jaesung/go/pkg/mod/github.com/q191201771/[email protected]/pkg/bele/bele.go:35
github.com/q191201771/lal/pkg/rtmp.(*ChunkComposer).RunLoop(0xc005c87ba0, {0x7f268208a638, 0xc017ab1c30}, 0xc01bcebf38)
        /home/jaesung/src/lal/pkg/rtmp/chunk_composer.go:186 +0x187e
github.com/q191201771/lal/pkg/rtmp.(*ServerSession).runReadLoop(...)
        /home/jaesung/src/lal/pkg/rtmp/server_session.go:201
github.com/q191201771/lal/pkg/rtmp.(*ServerSession).RunLoop(0xc00162e540)
        /home/jaesung/src/lal/pkg/rtmp/server_session.go:132 +0xbc
github.com/q191201771/lal/pkg/rtmp.(*Server).handleTcpConnect(0xc000416270, {0x10d41d0, 0xc00513e700})
        /home/jaesung/src/lal/pkg/rtmp/server.go:102 +0xe5
created by github.com/q191201771/lal/pkg/rtmp.(*Server).RunLoop
        /home/jaesung/src/lal/pkg/rtmp/server.go:86 +0x25

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (181e594) 56.26% compared to head (5f32142) 56.16%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #331      +/-   ##
==========================================
- Coverage   56.26%   56.16%   -0.11%     
==========================================
  Files         132      132              
  Lines       11447    11448       +1     
==========================================
- Hits         6441     6430      -11     
- Misses       4316     4324       +8     
- Partials      690      694       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.