Fix a bug which leave BLOCKSIZE of BloIO produced by IsaFloppy to be zero when the driver detect no media is changed in the driver.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3896 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed