block/vdi.c: Fix several bugs
* The code for option '-static' was wrong, so image creation always created static images. * Static images created with qemu-img did not set header entry blocks_allocated. * The size of the block map must be rounded to the next multiple of SECTOR_SIZE, otherwise the block map is only read partially for block map sizes which are not a multiple of SECTOR_SIZE. Signed-off-by: NStefan Weil <weil@mail.berlios.de> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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