tools lib traceevent: Silence compiler warning on 32bit build

The gcc complains about casting a pointer to unsigned long long directly:

    SUBDIR ../lib/traceevent/
  CC FPIC            event-parse.o
  CC FPIC            trace-seq.o
  CC FPIC            parse-filter.o
/home/namhyung/project/linux/tools/lib/traceevent/parse-filter.c: In function ‘get_value’:
/home/namhyung/project/linux/tools/lib/traceevent/parse-filter.c:1588: warning: cast from pointer to integer of different size
  CC FPIC            parse-utils.o
  BUILD STATIC LIB   libtraceevent.a
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1338003691-3141-1-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/lib/traceevent/parse-filter.c

@@ -1584,7 +1584,7 @@ get_value(struct event_format *event,
 		const char *name;
 
 		name = get_comm(event, record);
-		return (unsigned long long)name;
+		return (unsigned long)name;
 	}
 
 	pevent_read_number_field(field, record->data, &val);