Remove an extraneous '.' after integer literal 8

"8." is interpreted as a double literal and causes a MSVC warning:
warning C4244: 'argument': conversion from 'double' to 'int',
possible loss of data

Introduced in https://aomedia-review.googlesource.com/c/aom/+/174141.

Change-Id: If442f324848ecc2f0da40ca4d2a28bc8e8cb677d

test/variance_test.cc

diff --git a/test/variance_test.cc b/test/variance_test.cc
index 20d4059..c2af7d5 100644
--- a/test/variance_test.cc
+++ b/test/variance_test.cc
@@ -2664,7 +2664,7 @@
                       MseParams(4, 4, &aom_highbd_10_mse16x16_sse2, 10),
                       MseParams(3, 3, &aom_highbd_10_mse8x8_sse2, 10),
                       MseParams(4, 4, &aom_highbd_8_mse16x16_sse2, 8),
-                      MseParams(3, 3, &aom_highbd_8_mse8x8_sse2, 8.)));
+                      MseParams(3, 3, &aom_highbd_8_mse8x8_sse2, 8)));
 
 const VarianceParams kArrayHBDVariance_sse2[] = {
   VarianceParams(7, 7, &aom_highbd_12_variance128x128_sse2, 12),