perf scripting perl: Do not die() when not founding event for a type

Do just like handling other cases i.e. print some debug message and
ignore the sample.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-t7kzlm3cxyvbd7d9n9554ai9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/scripting-engines/trace-event-perl.c

@@ -350,8 +350,10 @@ static void perl_process_tracepoint(struct perf_sample *sample,
 	if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
 		return;
 
-	if (!event)
-		die("ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
+	if (!event) {
+		pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
+		return;
+	}
 
 	pid = raw_field_value(event, "common_pid", data);