Fix improper memset statement.

Instead of memset(pointer, 0, sizeof(pointer)), we should use
"memset(pointer, 0, sizeof(*pointer))".

BRANCH=none
TEST=Built successfully
BUG=None

Change-Id: I72e224188ccede1a1f83efa7fa3138e4a0ecd3b3
Reviewed-on: https://chromium-review.googlesource.com/167880
Reviewed-by: Luis Lozano <llozano@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Han Shen <shenhan@google.com>
Commit-Queue: Han Shen <shenhan@google.com>
Tested-by: Han Shen <shenhan@google.com>
diff --git a/tests/vboot_kernel_tests.c b/tests/vboot_kernel_tests.c
index 8dde9cb..fdf81b7 100644
--- a/tests/vboot_kernel_tests.c
+++ b/tests/vboot_kernel_tests.c
@@ -81,7 +81,7 @@
 	mock_data_key = (RSAPublicKey *)"TestDataKey";
 	mock_data_key_allocated = 0;
 
-	memset(gbb, 0, sizeof(gbb));
+	memset(gbb, 0, sizeof(*gbb));
 	gbb->major_version = GBB_MAJOR_VER;
 	gbb->minor_version = GBB_MINOR_VER;
 	gbb->flags = 0;