* grub-core/fs/afs.c (GRUB_AFS_BLOCKS_PER_DI_RUN): Replaced with...
(GRUB_AFS_LOG_BLOCKS_PER_DI_RUN): ... this.
(GRUB_AFS_BLOCKRUN_LOG_SIZE): New definition.
(grub_afs_read_inode): Use block_shift.
(RANGE_SHIFT): New definition.
(grub_afs_read_block): Account for RANGE_SHIFT, emit errors on
unexpected conditions, use shifts and appropriate types.
(GRUB_MOD_INIT): Check the value of GRUB_AFS_BLOCKRUN_LOG_SIZE.