Remove unused bcp_column_data field from BCP_HOSTCOLINFO

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Add missing file required for tests

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Fix some issue with big endian machines

Make compile again.
Fix VARIANT type.

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Remove type warning calling tds_swap_bytes

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Fix some possible compile warnings in read.c

Some compiler rules could be broken doing strange pointer conversion and
dereference, avoid to do this declaring the right type.
This could even fix some compiler problems if buffer was not aligned as
required.

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>