Zero the best share string memory when zeroing stats.
diff --git a/cgminer.c b/cgminer.c
index 41cf4e8..876abed 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -3931,6 +3931,7 @@ void zero_stats(void)
total_secs = 1.0;
best_diff = 0;
total_diff1 = 0;
+ memset(best_share, 0, 8);
suffix_string(best_diff, best_share, 0);
for (i = 0; i < total_pools; i++) {