Fix ext-tile without ext-partition.

Default case (when ext-partition was not configured) was incorrect
in encoder tile size initialization.

BUG=https://bugs.chromium.org/p/webm/issues/detail?id=1197

Change-Id: Ibe57cb1dc16b9fa300573816fc16d2d2f6849fc6

vp10/encoder/encoder.c

diff --git a/vp10/encoder/encoder.c b/vp10/encoder/encoder.c
index 437b366..21ed965 100644
--- a/vp10/encoder/encoder.c
+++ b/vp10/encoder/encoder.c
@@ -833,14 +833,18 @@
     cm->tile_height = clamp(cpi->oxcf.tile_rows, 1, 32);
     cm->tile_width  <<= MAX_MIB_SIZE_LOG2;
     cm->tile_height <<= MAX_MIB_SIZE_LOG2;
-  } else
-#endif  // CONFIG_EXT_PARTITION
-  {
+  } else {
     cm->tile_width  = clamp(cpi->oxcf.tile_columns, 1, 64);
     cm->tile_height = clamp(cpi->oxcf.tile_rows, 1, 64);
     cm->tile_width  <<= MAX_MIB_SIZE_LOG2 - 1;
     cm->tile_height <<= MAX_MIB_SIZE_LOG2 - 1;
   }
+#else
+  cm->tile_width  = clamp(cpi->oxcf.tile_columns, 1, 64);
+  cm->tile_height = clamp(cpi->oxcf.tile_rows, 1, 64);
+  cm->tile_width  <<= MAX_MIB_SIZE_LOG2;
+  cm->tile_height <<= MAX_MIB_SIZE_LOG2;
+#endif  // CONFIG_EXT_PARTITION
 
   cm->tile_width  = VPXMIN(cm->tile_width, cm->mi_cols);
   cm->tile_height = VPXMIN(cm->tile_height, cm->mi_rows);