librados: behave if errcb is NULL

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/librados/librados.cc b/src/librados/librados.cc
index 4b648ed394b4f65e9d6df537c1f39b8e6253557e..b86b008f35474e0213b824854111690cb1d06f8f 100644 (file)
--- a/src/librados/librados.cc
+++ b/src/librados/librados.cc
@@ -3783,7 +3783,8 @@ struct C_WatchCB2 : public librados::WatchCtx2 {
     wcb(arg, notify_id, cookie, notifier_gid, bl.c_str(), bl.length());
   }
   void handle_error(uint64_t cookie, int err) {
-    errcb(arg, cookie, err);
+    if (errcb)
+      errcb(arg, cookie, err);
   }
 };