perf data: Close all files in close_dir()

When using 'perf report' in directory mode, the first file is not closed
on exit, causing a memory leak.

The problem is caused by the iterating variable never reaching 0.

Fixes: 1455206 ("perf data: Add perf_data__(create_dir|close_dir) functions")
Signed-off-by: Riccardo Mancini <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zhen Lei <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: Manciukic

tools/perf/util/data.c

@@ -20,7 +20,7 @@
 
 static void close_dir(struct perf_data_file *files, int nr)
 {
-	while (--nr >= 1) {
+	while (--nr >= 0) {
 		close(files[nr].fd);
 		zfree(&files[nr].path);
 	}