fixed https://code.google.com/p/heekscnc/issues/detail?id=359
fixed https://code.google.com/p/heekscnc/issues/detail?id=359
elliotf/heekscnc,AlanZheng/heekscnc,JamieFBousfield/heekscnc,elliotf/heekscnc,sangit/heekscnc,Nurb432/heekscnc,JamieFBousfield/heekscnc,FluffyMortain/heekscnc,ant-t/heekscnc,sangit/heekscnc,singwina/heekscnc,masika/heekscnc,JamieFBousfield/heekscnc,dnevels/heekscnc,blakelyc/heekscnc,FluffyMortain/heekscnc,elliotf/heekscnc,BbiKkuMi/heekscnc,pyrotron/heekscnc,Nurb432/heekscnc,pyrotron/heekscnc,hackendless/heekscnc,AlanZheng/heekscnc,dnevels/heekscnc,ant-t/heekscnc,BbiKkuMi/heekscnc,Nurb432/heekscnc,ant-t/heekscnc,sangit/heekscnc,FluffyMortain/heekscnc,masika/heekscnc,singwina/heekscnc,pyrotron/heekscnc,ant-t/heekscnc,AlanZheng/heekscnc,hackendless/heekscnc,blakelyc/heekscnc,dnevels/heekscnc,blakelyc/heekscnc,hackendless/heekscnc,FluffyMortain/heekscnc,JamieFBousfield/heekscnc,sangit/heekscnc,BbiKkuMi/heekscnc,hackendless/heekscnc,masika/heekscnc,blakelyc/heekscnc,singwina/heekscnc,dnevels/heekscnc,pyrotron/heekscnc,singwina/heekscnc,Nurb432/heekscnc,BbiKkuMi/heekscnc,AlanZheng/heekscnc,elliotf/heekscnc,masika/heekscnc