perf tools: Move init_have_children field to the unnamed union

The init_have_children is used to init callchain info only for TUI.  So
it'd be better to move it to the TUI-specific unnamed union member.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429687101-4360-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/sort.h

@@ -96,7 +96,6 @@ struct hist_entry {
 	/* We are added by hists__add_dummy_entry. */
 	bool			dummy;
 
-	bool			init_have_children;
 	char			level;
 	u8			filtered;
 	union {
@@ -109,6 +108,7 @@ struct hist_entry {
 		struct /* for TUI */ {
 			u16	row_offset;
 			u16	nr_rows;
+			bool	init_have_children;
 		};
 	};
 	char			*srcline;