Fix fsbtodb() for UFS1.  This fixes an overflow for file sizes >1 TB, allowing for sizes up to 4 TB.  This doesn't affect UFS2 since b is already a 64 bit type, coincidental with daddr_t.
Fix fsbtodb() for UFS1.  This fixes an overflow for file sizes >1 TB,
allowing for sizes up to 4 TB.  This doesn't affect UFS2 since b is already
a 64 bit type, coincidental with daddr_t.

Submitted by:	bde

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase