perf hists browser: Fix off-by-two bug on the first column

The commit 5395a048 ("perf hists: Separate overhead and baseline
columns") makes the "Overhead" column no more the first one.  So it
resulted in the mis-aligned column in the normal (non-diff) output.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/NoneSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/browsers/hists.c

@@ -610,6 +610,7 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 	char folded_sign = ' ';
 	bool current_entry = ui_browser__is_current_entry(&browser->b, row);
 	off_t row_offset = entry->row_offset;
+	bool first = true;
 
 	if (current_entry) {
 		browser->he_selection = entry;
@@ -633,10 +634,11 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 			if (!perf_hpp__format[i].cond)
 				continue;
 
-			if (i) {
+			if (!first) {
 				slsmg_printf("  ");
 				width -= 2;
 			}
+			first = false;
 
 			if (perf_hpp__format[i].color) {
 				hpp.ptr = &percent;