Fix typos

In a previous commit: 5db9743fbbe500bb802b5e5f5eb4e495621e29f7, two
changes that appeared to be typos are breaking build when experiments
are enabled:

../../libvpx/configure --enable-experimental --enable-ref-mv
--enable-ext-intra --enable-ext-refs --enable-ext-interp
--enable-supertx --enable-var-tx --enable-entropy --enable-ext-inter
--enable-ext-tx  --enable-motion-var --enable-dual-filter
--enable-ext-partition --enable-ext-partition-types
--enable-loop-restoration --enable-rect-tx --enable-palette
--enable-aom-highbitdepth --enable-filter-intra --enable-internal-stats
&& make clean && make -j16

This commit fixes the issue.

Change-Id: I9ce5bbc96df326214202868cb0669bd334c86851
diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index c987a5c..ce8695a 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -9440,8 +9440,8 @@
           filter_intra_mode_info_uv[uv_tx].filter_intra_mode[1];
     }
 #endif  // CONFIG_FILTER_INTRA
-    skippable = skippable && skip_uv[uv_tx];
-    distortion2 = distortion_y + dist_uv[uv_tx];
+    skippable = skippable && skip_uvs[uv_tx];
+    distortion2 = distortion_y + dist_uvs[uv_tx];
     rate2 = rate_y + rate_overhead + rate_uv_intra[uv_tx];
     rate2 += ref_costs_single[INTRA_FRAME];