More defensive  handling of missing filename in file node. (in line with jshint)
More defensive  handling of missing filename in file node.
(in line with jshint)
ioglue/ioglue,whummer/node-red,dbuentello/node-red,node-red/node-red,syzer/node-red,mw75/node-red,beni55/node-red,augustnmonteiro/skills-visual-programming,the-osgarden/pi-nodered-osg,codeaudit/node-red,mw75/node-red,mw75/node-red,ty4tw/node-red,xively/habanero,iotcafe/node-red,dorado-lmz/node-red,HiroyasuNishiyama/node-red,wajnberg/node-red,rntdrts/node-red,augustnmonteiro/skills-visual-programming,avinod1987/Node-Red,iotcafe/node-red,mblackstock/node-red-contrib,whummer/node-red,iotcafe/node-red,udayanga91/node-red,cgvarela/node-red,fpt-software/seniot-data-workflow,dbuentello/node-red,ChipSoftTech/HANDS2,retailos/node-red,anusornc/node-red,syzer/node-red,lucciano/node-red,mikestebbins/node-red,lucciano/node-red,FlowDesigner/node-red,fcollova/node-red,the-osgarden/pi-nodered-osg,fcollova/node-red,wajnberg/node-red,whoGloo/node-red,Ubicall/node-red,mikestebbins/node-red,ty4tw/node-red,ChipSoftTech/HANDS2,dbuentello/node-red,rdrm2014/node-red,redcom/node-red-freeboard,ChipSoftTech/HANDS2,ppillip/node-red,HiroyasuNishiyama/node-red,udayanga91/node-red,btsimonh/node-red,modulexcite/node-red,ppillip/node-red,MADAR15/IoT-Modeler,rdrm2014/node-red,mikestebbins/node-red,anusornc/node-red,kanki8086/node-red,michaelsteenkamp/node-red,avinod1987/Node-Red,mblackstock/node-red-contrib,coderofsalvation/node-red,olopez32/node-red,coderofsalvation/node-red,redcom/node-red-freeboard,Tizen-Sunfish/ehf-node-red,zcpara/robot_gui_program,namgk/node-red,retailos/node-red,darcy202/node-red,HiroyasuNishiyama/node-red,anusornc/node-red,fpt-software/seniot-data-workflow,monteslu/pagenodes,ddm/node-red,the-osgarden/pi-nodered-osg,tak4hir0/node-red,MADAR15/IoT-Modeler,emiloberg/node-red,ddm/node-red,whummer/node-red,iotcafe/node-red,tak4hir0/node-red,modulexcite/node-red,emiloberg/node-red,MaxXx1313/my-node-red,zcpara/robot_gui_program,estbeetoo/beetoo-controller,redcom/node-red-freeboard,xively/habanero,codeaudit/node-red,node-red/node-red,giovannicuriel/mashup,kanki8086/node-red,avinod1987/NodeRed,ChipSoftTech/HANDS2,knolleary/node-red,kanki8086/node-red,gbraad/node-red,nosun/node-red,fpt-software/seniot-data-workflow,Tizen-Sunfish/ehf-node-red,btsimonh/node-red,modulexcite/node-red,ty4tw/node-red,mw75/node-red,giovannicuriel/mashup,olopez32/node-red,cloudfoundry-community/node-red-cf-ready,node-red/node-red,avinod1987/Node-Red,rntdrts/node-red,michaelsteenkamp/node-red,avinod1987/Node-Red,cgvarela/node-red,rdrm2014/node-red,cgvarela/node-red,MaxXx1313/my-node-red,nuroglu/cloudgate,syzer/node-red,dojot/mashup,retailos/node-red,ddm/node-red,dorado-lmz/node-red,Ubicall/node-red,PaGury/node-red,dojot/mashup,coderofsalvation/node-red,redconnect-io/node-red,FlowDesigner/node-red,augustnmonteiro/skills-visual-programming,PaGury/node-red,the-osgarden/pi-nodered-osg,redconnect-io/node-red,lostinthestory/node-red,nosun/node-red,PaGury/node-red,olopez32/node-red,beni55/node-red,codeaudit/node-red,michaelsteenkamp/node-red,dorado-lmz/node-red,weitingchou/humix-think,knolleary/node-red,darcy202/node-red,xively/habanero,mikestebbins/node-red,nosun/node-red,nuroglu/cloudgate,whoGloo/node-red,drwoods/node-red,beni55/node-red,giovannicuriel/mashup,lostinthestory/node-red,Kazuki-Nakanishi/node-red,lucciano/node-red,estbeetoo/beetoo-controller,kanki8086/node-red,codeaudit/node-red,wajnberg/node-red,MaxXx1313/my-node-red,darcy202/node-red,cloudfoundry-community/node-red-cf-ready,avinod1987/NodeRed,nuroglu/cloudgate,retailos/node-red,Kazuki-Nakanishi/node-red,emiloberg/node-red,ddm/node-red,whoGloo/node-red,anusornc/node-red,darcy202/node-red,estbeetoo/beetoo-controller,nosun/node-red,avinod1987/NodeRed,redconnect-io/node-red,knolleary/node-red,whummer/node-red,lostinthestory/node-red,coderofsalvation/node-red,beni55/node-red,zcpara/robot_gui_program,estbeetoo/beetoo-controller,weitingchou/humix-think,nuroglu/cloudgate,cloudfoundry-community/node-red-cf-ready,modulexcite/node-red,dbuentello/node-red,drwoods/node-red,syzer/node-red,FlowDesigner/node-red,weitingchou/humix-think,dojot/mashup,Kazuki-Nakanishi/node-red,augustnmonteiro/skills-visual-programming,Kazuki-Nakanishi/node-red,fcollova/node-red,ioglue/ioglue,MADAR15/IoT-Modeler,udayanga91/node-red,PaGury/node-red,FlowDesigner/node-red,drwoods/node-red,weitingchou/humix-think,ppillip/node-red,whoGloo/node-red,fcollova/node-red,drwoods/node-red,monteslu/pagenodes,rntdrts/node-red,lucciano/node-red,avinod1987/NodeRed,knolleary/node-red,udayanga91/node-red,wajnberg/node-red,btsimonh/node-red,redconnect-io/node-red,fpt-software/seniot-data-workflow,lostinthestory/node-red,redcom/node-red-freeboard,Ubicall/node-red,zcpara/robot_gui_program,gbraad/node-red,cgvarela/node-red,MaxXx1313/my-node-red,gbraad/node-red,ilc-opensource/mcf,giovannicuriel/mashup,dorado-lmz/node-red,xively/habanero,Ubicall/node-red,olopez32/node-red,ioglue/ioglue,michaelsteenkamp/node-red,gbraad/node-red,cloudfoundry-community/node-red-cf-ready,ppillip/node-red,rdrm2014/node-red,namgk/node-red,dojot/mashup