libtracecmd: trace-cmd split: Do not fail if cmdlines are not present

If the input file that is being split does not contain a 'cmdline'
section, do not fail. The section is optional.

Link: https://lore.kernel.org/linux-trace-devel/20240116211415.41b530e5@gandalf.local.home

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
1 file changed