Fixed compiler warnings. Explicit cast on crc vars (64 bit to 32 bit).  Need to be 64 bit for crcq instruction, but only 32 bits are used.
Fixed compiler warnings. Explicit cast on crc vars (64 bit to 32 bit).  Need to be 64 bit for crcq instruction, but only 32 bits are used.

iscsi-osx/iSCSIInitiator,iscsi-osx/iSCSIInitiator,iscsi-osx/iSCSIInitiator