perf record: Move machine variable down the function

It's used far more down to be declared on the top of the __cmd_record.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180307155020.32613-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -854,7 +854,6 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 	int status = 0;
 	unsigned long waking = 0;
 	const bool forks = argc > 0;
-	struct machine *machine;
 	struct perf_tool *tool = &rec->tool;
 	struct record_opts *opts = &rec->opts;
 	struct perf_data *data = &rec->data;
@@ -959,8 +958,6 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		goto out_child;
 	}
 
-	machine = &session->machines.host;
-
 	err = record__synthesize(rec, false);
 	if (err < 0)
 		goto out_child;
@@ -988,6 +985,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 	 * Let the child rip
 	 */
 	if (forks) {
+		struct machine *machine = &session->machines.host;
 		union perf_event *event;
 		pid_t tgid;