The 'tcpaccept' bcc-tool fails to show an incoming connection details

Issue

• The tcpaccept script didn't show anything when there was an incoming connection.

# /usr/share/bcc/tools/tcpaccept
PID     COMM         IP RADDR            RPORT LADDR            LPORT
<no-output>

• The issue is not reproducible with upstream bcc-tools:

# ./tcpaccept.py 
PID     COMM         IP RADDR            RPORT LADDR            LPORT
917     sshd         4  10.74.16.4       38610 10.72.32.23      22   
1568    restraintd   6  ::1              39018 ::1              8081