Undo wrong NULLing in grpclb
diff --git a/src/core/ext/lb_policy/grpclb/grpclb.c b/src/core/ext/lb_policy/grpclb/grpclb.c
index d8ef0c8..b7f4698 100644
--- a/src/core/ext/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/lb_policy/grpclb/grpclb.c
@@ -768,7 +768,6 @@
* while holding glb_policy->mu: lb_on_server_status_received, invoked due to
* the cancel, needs to acquire that same lock */
grpc_call *lb_call = glb_policy->lb_call;
- glb_policy->lb_call = NULL;
gpr_mu_unlock(&glb_policy->mu);
/* glb_policy->lb_call and this local lb_call must be consistent at this point