perf trace: Fix potential NULL pointer dereference found by the smatch tool

Based on the following report from Smatch, fix the potential NULL
pointer dereference check.

  tools/perf/builtin-trace.c:1044
  thread_trace__new() error: we previously assumed 'ttrace' could be
  null (see line 1041).

  tools/perf/builtin-trace.c
  1037 static struct thread_trace *thread_trace__new(void)
  1038 {
  1039         struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
  1040
  1041         if (ttrace)
  1042                 ttrace->files.max = -1;
  1043
  1044         ttrace->syscall_stats = intlist__new(NULL);
               ^^^^^^^^
  1045
  1046         return ttrace;
  1047 }

Signed-off-by: Leo Yan <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Alexey Budankov <[email protected]>
Cc: Alexios Zavras <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Eric Saint-Etienne <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Song Liu <[email protected]>
Cc: Suzuki Poulouse <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Richter <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
[ Just made it look like other tools/perf constructors, same end result ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions