perf script: Stop using pevent directly

We can get all that is needed using just event_format, that is available
via evsel->tp_format now.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2hsr1686epa9f0vx4yg7z2zj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 8006978..df7d33d 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -221,7 +221,6 @@
 }
 
 static void python_process_event(union perf_event *perf_event __unused,
-				 struct pevent *pevent,
 				 struct perf_sample *sample,
 				 struct perf_evsel *evsel,
 				 struct machine *machine __unused,
@@ -248,7 +247,7 @@
 	if (!event)
 		die("ug! no event found for type %d", (int)evsel->attr.config);
 
-	pid = trace_parse_common_pid(pevent, data);
+	pid = raw_field_value(event, "common_pid", data);
 
 	sprintf(handler_name, "%s__%s", event->system, event->name);
 
@@ -293,7 +292,7 @@
 				offset = field->offset;
 			obj = PyString_FromString((char *)data + offset);
 		} else { /* FIELD_IS_NUMERIC */
-			val = read_size(pevent, data + field->offset,
+			val = read_size(event, data + field->offset,
 					field->size);
 			if (field->flags & FIELD_IS_SIGNED) {
 				if ((long long)val >= LONG_MIN &&