prioq: never shuffle identical entries

Skip shuffling identical entries in shuffle_up(), just like we already do
in shuffle_down().

diff --git a/src/basic/prioq.c b/src/basic/prioq.c
index b89888be0e8d5460313ffc3e9712856f214ce5d2..5e567b181d3ae1e6e6d5ded2201e35ae86b82489 100644 (file)
--- a/src/basic/prioq.c
+++ b/src/basic/prioq.c
@@ -101,7 +101,7 @@ static unsigned shuffle_up(Prioq *q, unsigned idx) {
 
                 k = (idx-1)/2;
 
-                if (q->compare_func(q->items[k].data, q->items[idx].data) < 0)
+                if (q->compare_func(q->items[k].data, q->items[idx].data) <= 0)
                         break;
 
                 swap(q, idx, k);