lib: Handle return error code of VbExDisplaySetDimension correctly.

The return value of VbExDisplaySetDimension should be handled as VbError_t,
which means we should print error message when it's not zero.
Also add the return code to debug message.

TEST=emerge-nyan coreboot chromeos-bootimage, enter recovery screen.
     Not seeing error messages anymore.

Change-Id: Icafdfd933d799e8496fedcf1633339065c6962a3
Reviewed-by: Bill Richardson <>
Commit-Queue: Hung-Te Lin <>
Tested-by: Hung-Te Lin <>
1 file changed