Migration Error SQLSTATE[22003]: Numeric value out of range: 'is_primary'

When migrating from D6 to D7 I got this error due to "is_primary" being a a tiny int

SQLSTATE[22003]: Numeric value out of range: 1264 Out of range value adjusted for column 'is_primary' at row 1: ...... [:db_insert_placeholder_10] => 171 ) (..../includes/common.inc:7291)

which I fixed by editing location.migrate.inc line 121

if (!empty($instance_arguments)) {
- $instance_arguments['is_primary'] = $value;
+ $instance_arguments['is_primary'] = ($delta == 0);
$instance_arguments['inhibit_geocode'] = TRUE;

Hope thats useful