MINOR make the 'default site' checkbox on a subsite actually work. If no subsite was found matching the requested domain, before returning 0 (the 'main' site), it will check for a 'default' site. (from r87086)
MINOR make the 'default site' checkbox on a subsite actually work. If no subsite was found matching the requested domain, before returning 0 (the 'main' site), it will check for a 'default' site. (from r87086)

danaenz/silverstripe-subsites,mikenz/silverstripe-simplesubsites,dnadesign/silverstripe-subsites,mandrew/silverstripe-subsites,silverstripe/silverstripe-subsites,silverstripe/silverstripe-subsites,danaenz/silverstripe-subsites,wernerkrauss/silverstripe-subsites,dnadesign/silverstripe-subsites,mikenz/silverstripe-simplesubsites,petpack/silverstripe-subsites,wernerkrauss/silverstripe-subsites,mandrew/silverstripe-subsites,petpack/silverstripe-subsites