Win64 compatibility for xmp

This patch makes xmp compatible with win64. Here is the relevant warning
from gcc:

sound_win32.c: In function 'init':
sound_win32.c:97:50: warning: cast from pointer to integer of different size

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Re-enable with-libxmp configure option

Mostly in a standards-compliant way this time, complain if set as "no".
This is being re-added by user request.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix screen corruption with large number of rows

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update version number

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix ignored amplify option bug

Signed-off-by: Dennis Lindroos <denafcm@gmail.com>
Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Merge branch 'master' of github.com:cmatsuoka/xmp-cli