test: unicode: fix a sizeof() vs ARRAY_SIZE() bug

The u16_strlcat() is in units of u16 not bytes.  So the limit needs to
be ARRAY_SIZE() instead of sizeof().

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
diff --git a/test/unicode_ut.c b/test/unicode_ut.c
index a9356e2..1d0d90c 100644
--- a/test/unicode_ut.c
+++ b/test/unicode_ut.c
@@ -807,12 +807,12 @@
 
 	/* dest and src are empty string */
 	memset(buf, 0, sizeof(buf));
-	ret = u16_strlcat(buf, &null_src, sizeof(buf));
+	ret = u16_strlcat(buf, &null_src, ARRAY_SIZE(buf));
 	ut_asserteq(0, ret);
 
 	/* dest is empty string */
 	memset(buf, 0, sizeof(buf));
-	ret = u16_strlcat(buf, src, sizeof(buf));
+	ret = u16_strlcat(buf, src, ARRAY_SIZE(buf));
 	ut_asserteq(4, ret);
 	ut_assert(!unicode_test_u16_strcmp(buf, src, 40));
 
@@ -820,7 +820,7 @@
 	memset(buf, 0xCD, (sizeof(buf) - sizeof(u16)));
 	buf[39] = 0;
 	memcpy(buf, dest, sizeof(dest));
-	ret = u16_strlcat(buf, &null_src, sizeof(buf));
+	ret = u16_strlcat(buf, &null_src, ARRAY_SIZE(buf));
 	ut_asserteq(5, ret);
 	ut_assert(!unicode_test_u16_strcmp(buf, dest, 40));