Fix build without ext-partition

Change-Id: I7cf9b4f82bce224cc327947779417dc91bf25184

av1/decoder/decodeframe.c

diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index be8cefc..af881e5 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -834,9 +834,14 @@
     }
   }
   if (!all_none) {
+#if CONFIG_EXT_PARTITION
     assert(cm->seq_params.sb_size == BLOCK_64X64 ||
            cm->seq_params.sb_size == BLOCK_128X128);
     const int sb_size = cm->seq_params.sb_size == BLOCK_128X128 ? 128 : 64;
+#else
+    assert(cm->seq_params.sb_size == BLOCK_64X64);
+    const int sb_size = 64;
+#endif
 
     for (int p = 0; p < num_planes; ++p)
       cm->rst_info[p].restoration_unit_size = sb_size;

av1/encoder/bitstream.c

diff --git a/av1/encoder/bitstream.c b/av1/encoder/bitstream.c
index 2a97d96..ec01e8f 100644
--- a/av1/encoder/bitstream.c
+++ b/av1/encoder/bitstream.c
@@ -2231,9 +2231,14 @@
     }
   }
   if (!all_none) {
+#if CONFIG_EXT_PARTITION
     assert(cm->seq_params.sb_size == BLOCK_64X64 ||
            cm->seq_params.sb_size == BLOCK_128X128);
     const int sb_size = cm->seq_params.sb_size == BLOCK_128X128 ? 128 : 64;
+#else
+    assert(cm->seq_params.sb_size == BLOCK_64X64);
+    const int sb_size = 64;
+#endif
 
     RestorationInfo *rsi = &cm->rst_info[0];