Fix integer overflow in sigar_uptime_string
Fix integer overflow in sigar_uptime_string

ruleless/sigar,monicasarbu/sigar,scouter-project/sigar,abhinavmishra14/sigar,boundary/sigar,hyperic/sigar,hyperic/sigar,abhinavmishra14/sigar,lsjeng/sigar,scouter-project/sigar,lsjeng/sigar,abhinavmishra14/sigar,kaustavha/sigar,scouter-project/sigar,kaustavha/sigar,lsjeng/sigar,abhinavmishra14/sigar,cit-lab/sigar,monicasarbu/sigar,kaustavha/sigar,cit-lab/sigar,monicasarbu/sigar,cit-lab/sigar,boundary/sigar,formicary/sigar,OlegYch/sigar,hyperic/sigar,couchbase/sigar,ChunPIG/sigar,scouter-project/sigar,OlegYch/sigar,hyperic/sigar,formicary/sigar,scouter-project/sigar,scouter-project/sigar,boundary/sigar,scouter-project/sigar,ruleless/sigar,cit-lab/sigar,monicasarbu/sigar,lsjeng/sigar,hyperic/sigar,hyperic/sigar,abhinavmishra14/sigar,OlegYch/sigar,kaustavha/sigar,OlegYch/sigar,boundary/sigar,monicasarbu/sigar,ruleless/sigar,boundary/sigar,ruleless/sigar,ChunPIG/sigar,ruleless/sigar,abhinavmishra14/sigar,formicary/sigar,cit-lab/sigar,formicary/sigar,lsjeng/sigar,OlegYch/sigar,abhinavmishra14/sigar,monicasarbu/sigar,ChunPIG/sigar,OlegYch/sigar,kaustavha/sigar,ChunPIG/sigar,ChunPIG/sigar,monicasarbu/sigar,formicary/sigar,kaustavha/sigar,racker/sigar,hyperic/sigar,scouter-project/sigar,lsjeng/sigar,cit-lab/sigar,kaustavha/sigar,abhinavmishra14/sigar,monicasarbu/sigar,cit-lab/sigar,boundary/sigar,cit-lab/sigar,lsjeng/sigar,kaustavha/sigar,lsjeng/sigar,racker/sigar,ChunPIG/sigar,scouter-project/sigar,cit-lab/sigar,boundary/sigar,cit-lab/sigar,formicary/sigar,abhinavmishra14/sigar,scouter-project/sigar,racker/sigar,boundary/sigar,kaustavha/sigar,ruleless/sigar,cit-lab/sigar,scouter-project/sigar,hyperic/sigar,lsjeng/sigar,formicary/sigar,kaustavha/sigar,racker/sigar,hyperic/sigar,ruleless/sigar,formicary/sigar,racker/sigar,racker/sigar,abhinavmishra14/sigar,boundary/sigar,ruleless/sigar,boundary/sigar,racker/sigar,monicasarbu/sigar,racker/sigar,hyperic/sigar,ChunPIG/sigar,monicasarbu/sigar,racker/sigar,abhinavmishra14/sigar,monicasarbu/sigar,kaustavha/sigar,ChunPIG/sigar,ruleless/sigar,racker/sigar,OlegYch/sigar,couchbase/sigar,OlegYch/sigar,lsjeng/sigar,OlegYch/sigar,ruleless/sigar,ChunPIG/sigar,hyperic/sigar,formicary/sigar,formicary/sigar,ChunPIG/sigar,OlegYch/sigar