perf header: Delete an unnecessary check before the calling free_event_desc()

Author: Markus Elfring <elfring@users.sourceforge.net>

The free_event_desc() function tests whether its argument is NULL and
then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Cc: Julia Lawall 
Cc: Peter Zijlstra 
Cc: kernel-janitors@vger.kernel.org
Link: http://lkml.kernel.org/r/558C2ABA.3000603@users.sourceforge.net
Signed-off-by: Arnaldo Carvalho de Melo 

---
 tools/perf/util/header.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 21a77e7..03ace57 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1063,8 +1063,7 @@ out:
 	free(buf);
 	return events;
 error:
-	if (events)
-		free_event_desc(events);
+	free_event_desc(events);
 	events = NULL;
 	goto out;
 }