Fix typo in loop control for computation of std. deviation

Thanks to Chris Wilson for pointing out this problem.

1 files changed, 1 insertions, 1 deletions

diff --git a/perf/cairo-stats.c b/perf/cairo-stats.c
index 2c6c7dc6..43711a97 100644
--- a/perf/cairo-stats.c
+++ b/perf/cairo-stats.c
@@ -92,7 +92,7 @@ _cairo_stats_compute (cairo_stats_t		*stats,
     stats->median_ticks = values[min_valid + num_valid / 2];
 
     sum = 0.0;
-    for (i = min_valid; i < num_valid; i++) {
+    for (i = min_valid; i < min_valid + num_valid; i++) {
 	delta = values[i] - mean;
 	sum += delta * delta;
     }