perf trace-event-info: Avoid passing NULL value to closedir

If opendir failed then closedir was passed NULL which is
erroneous. Caught by clang-tidy.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: llvm@lists.linux.dev
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20231009183920.200859-18-irogers@google.comSigned-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/util/trace-event-info.c

@@ -313,7 +313,8 @@ static int record_event_files(struct tracepoint_path *tps)
 	}
 	err = 0;
 out:
-	closedir(dir);
+	if (dir)
+		closedir(dir);
 	put_tracing_file(path);
 
 	return err;