Fix a potential invalid memory access in non-RD coding flow

This commit fixes a potential out-of-boundary memory access due to
the use of reuse_inter_pred_sby in the non-RD coding flow. It
resolves the corresponding asan error.

Change-Id: Iff605f5921230966990013541cd855d698810922

test/cpu_speed_test.cc

@@ -139,5 +139,5 @@ VP9_INSTANTIATE_TEST_CASE(
     CpuSpeedTest,
     ::testing::Values(::libvpx_test::kTwoPassGood, ::libvpx_test::kOnePassGood,
                       ::libvpx_test::kRealTime),
-    ::testing::Range(0, 8));
+    ::testing::Range(0, 9));
 }  // namespace