Fixed tester

libraries/testing/tester.cpp

@@ -106,7 +106,7 @@ namespace eosio { namespace testing {
          control->start_block( next_time );
       }
 
-      auto producer = control->pending_block_state()->get_scheduled_producer(next_time);
+      auto producer = control->head_block_state()->get_scheduled_producer(next_time);
       private_key_type priv_key;
       // Check if signing private key exist in the list
       auto private_key_itr = block_signing_private_keys.find( producer.block_signing_key );