trace-cmd: Print port on error using %s not %d
trace-cmd: Print port on error using %s not %d

On error to connecting to a machine, the port is printed with a %d. But the variable
is of type char * and a %s should be used.

Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd