defend against undefined property

services/web/public/coffee/ide/share/controllers/ShareProjectModalController.coffee

@@ -81,7 +81,7 @@ define [
 						return addNextMember()
 
 					# NOTE: groups aren't really a thing in ShareLaTeX, partially inherited from DJ
-					if member.display in currentInviteEmails and inviteId = _.find($scope.project.invites, (invite) -> invite.email == member.display)?._id
+					if member.display in currentInviteEmails and inviteId = _.find(($scope.project.invites || []), (invite) -> invite.email == member.display)?._id
 						request = projectInvites.resendInvite(inviteId)
 					else if member.type == "user"
 						request = projectInvites.sendInvite(member.email, $scope.inputs.privileges)