1. According to the value of RowInfoArraySize to get the actual number of printed line. 2. If RowInfoArraySize equates 0, then it means nothing is printed. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8464 6f19259b-4bc3-4df7-8a09-765794883524