find the line:
if(!fromAddress.enabled || 'address_0' != 'address_0') {
and change it to:
if(!fromAddress.enabled || 'address_0' != 'address_0' || fromAddress.full == 'undefined') {
also change:
directions.load('from: ' + fromAddress.full + ' to: ' + address_0.full);
wagmp_map_1_obj.directions = directions;
To:
if (fromAddress.full != 'undefined') {
directions.load('from: ' + fromAddress.full + ' to: ' + address_0.full);
wagmp_map_1_obj.directions = directions;
}