Fix an lb_policy leak

src/core/client_config/lb_policies/pick_first.c

@@ -192,6 +192,7 @@ loop:
           grpc_iomgr_add_delayed_callback(pp->on_complete, 1);
           gpr_free(pp);
         }
+        unref = 1;
       } else {
         p->checking_subchannel %= p->num_subchannels;
         p->checking_connectivity = grpc_subchannel_check_connectivity(

src/core/surface/call.h

@@ -94,8 +94,6 @@ grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq,
 void grpc_call_set_completion_queue(grpc_call *call, grpc_completion_queue *cq);
 grpc_completion_queue *grpc_call_get_completion_queue(grpc_call *call);
 
-#define GRPC_CALL_REF_COUNT_DEBUG
-
 #ifdef GRPC_CALL_REF_COUNT_DEBUG
 void grpc_call_internal_ref(grpc_call *call, const char *reason);
 void grpc_call_internal_unref(grpc_call *call, const char *reason,