From f23b24f1bf90b56cfaeb2a1c9b77c46efe8916a6 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 17 Dec 2013 09:02:36 +0900
Subject: [PATCH] tools lib traceevent: Get rid of die() in some string
 conversion functions

Those functions stringify filter arguments.

As caller of those functions handles NULL string properly, it seems that
it's enough to return NULL rather than calling die().

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/878uvkgx9f.fsf@sejong.aot.lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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