Fix overflow in calculation of total file system blocks

Blocks per group and group desc count are both 32-bit; multiplied they
produce a 32-bit quantity which overflowed.

Signed-off-by: Valerie Aurora Henson <vaurora@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
3 files changed