comp_mask_variance_test: Fix typo in #if.

Change-Id: I45f984f5de31259b7fad4a5beb2580ffea8c8344
diff --git a/test/comp_mask_variance_test.cc b/test/comp_mask_variance_test.cc
index 6107203..fec9248 100644
--- a/test/comp_mask_variance_test.cc
+++ b/test/comp_mask_variance_test.cc
@@ -35,7 +35,7 @@
                                     int ref_stride, const uint8_t *mask,
                                     int mask_stride, int invert_mask);
 
-#if HAVE_SSSE3 || HAVE_SSE2 || HAVE_AV2
+#if HAVE_SSSE3 || HAVE_SSE2 || HAVE_AVX2
 const BLOCK_SIZE kValidBlockSize[] = {
   BLOCK_8X8,   BLOCK_8X16, BLOCK_8X32,  BLOCK_16X8,  BLOCK_16X16,
   BLOCK_16X32, BLOCK_32X8, BLOCK_32X16, BLOCK_32X32,