[PATCH 2/6] Devel::Mwrap::reset is a no-op if `totals' not initialized

[Eric Wong <e@80x24.org>]

Don't segfault in case we fail to create rculfhash.
---
 Mwrap.xs | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/Mwrap.xs b/Mwrap.xs
index 518edb1..e87fe30 100644
--- a/Mwrap.xs
+++ b/Mwrap.xs
@@ -909,14 +909,15 @@ CODE:
 
 	rcu_read_lock();
 	t = CMM_LOAD_SHARED(totals);
-	cds_lfht_for_each_entry(t, &iter, l, hnode) {
-		uatomic_set(&l->total, 0);
-		uatomic_set(&l->allocations, 0);
-		uatomic_set(&l->frees, 0);
-		uatomic_set(&l->freed_bytes, 0);
-		uatomic_set(&l->age_total, 0);
-		uatomic_set(&l->max_lifespan, 0);
-	}
+	if (t)
+		cds_lfht_for_each_entry(t, &iter, l, hnode) {
+			uatomic_set(&l->total, 0);
+			uatomic_set(&l->allocations, 0);
+			uatomic_set(&l->frees, 0);
+			uatomic_set(&l->freed_bytes, 0);
+			uatomic_set(&l->age_total, 0);
+			uatomic_set(&l->max_lifespan, 0);
+		}
 	rcu_read_unlock();
 
 Devel::Mwrap::SrcLoc