fix committed stat

_mi_os_free reduces the stat by the full size without taking uncommitted
sections into account.
For this reason we have to add the uncommitted sections to the stat before
calling it.

src/arena.c

@@ -632,9 +632,9 @@ void _mi_arena_free(void* p, size_t size, size_t committed_size, mi_memid_t memi
 
   if (mi_memkind_is_os(memid.memkind)) {
     // was a direct OS allocation, pass through
-    if (!all_committed && committed_size > 0) {
-      // if partially committed, adjust the committed stats (as `_mi_os_free` will increase decommit by the full size)
-      _mi_stat_decrease(&_mi_stats_main.committed, committed_size);
+    if (!all_committed) {
+      // if partially committed, adjust the committed stats (as `_mi_os_free` reduce the stat by the full size)
+      _mi_stat_increase(&_mi_stats_main.committed, size - committed_size);
     }
     _mi_os_free(p, size, memid, stats);
   }