Tweak encoding flags for supertx.

Change-Id: I46f69d3a176897294d33c3f6d30b23c75b6267a8
diff --git a/vp10/encoder/encodeframe.c b/vp10/encoder/encodeframe.c
index 755c33b..2b96a86 100644
--- a/vp10/encoder/encodeframe.c
+++ b/vp10/encoder/encodeframe.c
@@ -2065,6 +2065,11 @@
       if (!x->skip) {
         // TODO(geza.lore): Investigate if this can be relaxed
         x->skip_recode = 0;
+        memset(x->skip_txfm, 0, sizeof(x->skip_txfm));
+
+        x->skip_optimize = 0;
+        x->use_lp32x32fdct = cpi->sf.use_lp32x32fdct;
+
         vp10_encode_sb_supertx(x, bsize);
         vp10_tokenize_sb_supertx(cpi, td, tp, !output_enabled, bsize);
       } else {