message: Fix a nontrivial unused-variable warning:
  the variable is unused only if neither of two #if paths
  are taken.
diff: @@ -481,6 +481,8 @@ inline void FullyConnected(
  return;
  #endif // GEMMLOWP_NEON
  + (void)gemmlowp_context;
  +
  // If both GEMMLOWP_NEON && NEON paths are skipped, fallback to reference
  // implementation.
  reference_integer_ops::FullyConnected(params, input_shape, input_data,
  