bug fix for lines()'s postponed style check 
bug fix for lines()'s postponed style check 

A style should be output unless style is explicitly set to null (i.e. a style should be output if style is undefined).
Devecoop/jsPDF,DavidPhilip/jsPDF,ixiom/jsPDF,Nankym/jsPDF,patrick-stevenok/jsPDF,JunichiWatanuki/jsPDF,ixiom/jsPDF,b12consulting/jsPDF,ProgrammerMatt/jsPDF,3t14/jsPDF,xuanhun/jsPDF,wulanrahayu/jsPDF,adjetiva/jsPDF,DT9/jsPDF,educostachaves/jsPDF,ixiom/jsPDF,Ju2ender/jsPDF,matejk/jsPDF,DT9/jsPDF,yWorks/jsPDF,klarkc/jsPDF,Nankym/jsPDF,JunichiWatanuki/jsPDF,SidPresse/jsPDF,u01jmg3/jsPDF,Nankym/jsPDF,JunichiWatanuki/jsPDF,Srikanth4/jsPDF,daniel-z/jsPDF,zky829/jsPDF,theDakotaCorbin/jsPDF,abhishekbhalani/jsPDF,DockDogs/jsPDF,BenMGilman/jsPDF,xuanhun/jsPDF,alexliubj/jsPDF,bgarrels/jsPDF,matejk/jsPDF,Setasign/jsPDF,DT9/jsPDF,Srikanth4/jsPDF,matejk/jsPDF,yWorks/jsPDF,Ju2ender/jsPDF,bgarrels/jsPDF,alexliubj/jsPDF,iszroil/JSTOPDF,SidPresse/jsPDF,educostachaves/jsPDF,sombr/jsPDF,abhishekbhalani/jsPDF,yWorks/jsPDF,adjetiva/jsPDF,b12consulting/jsPDF,ealves-pt/jsPDF,b12consulting/jsPDF,bartvde/jsPDF,DockDogs/jsPDF,DavidPhilip/jsPDF,kjartab/jsPDF,Flamenco/jsPDF,zky829/jsPDF,u01jmg3/jsPDF,3t14/jsPDF,IlyasRidhuan/jsPDF,iszroil/JSTOPDF,trantu/jsPDF,adjetiva/jsPDF,gdseller/jsPDF,iszroil/JSTOPDF,Setasign/jsPDF,sombr/jsPDF,MrRio/jsPDF,zky829/jsPDF,wulanrahayu/jsPDF,daniel-z/jsPDF,wulanrahayu/jsPDF,alexliubj/jsPDF,b12consulting/jsPDF,Devecoop/jsPDF,Flamenco/jsPDF,DavidPhilip/jsPDF,cjwilburn/jsPDF,alexliubj/jsPDF,kjartab/jsPDF,hostrare/jsPDF,ealves-pt/jsPDF,cjwilburn/jsPDF,MrRio/jsPDF,ixiom/jsPDF,abhishekbhalani/jsPDF,3t14/jsPDF_ja,educostachaves/jsPDF,BenMGilman/jsPDF,sombr/jsPDF,iszroil/JSTOPDF,DT9/jsPDF,3t14/jsPDF_ja,hostrare/jsPDF,patrick-stevenok/jsPDF,SidPresse/jsPDF,BenMGilman/jsPDF,SidPresse/jsPDF,sombr/jsPDF,klarkc/jsPDF,trantu/jsPDF,jutunen/jsPDF-table_2,xuanhun/jsPDF,toddmoorega/jsPDF,theDakotaCorbin/jsPDF,ProgrammerMatt/jsPDF,matejk/jsPDF,bgarrels/jsPDF,gdseller/jsPDF,theDakotaCorbin/jsPDF,felipealbuquerq/jsPDF,BenMGilman/jsPDF,toddmoorega/jsPDF,3t14/jsPDF_ja,zky829/jsPDF,Ju2ender/jsPDF,3t14/jsPDF,Srikanth4/jsPDF,bartvde/jsPDF,patrick-stevenok/jsPDF,toddmoorega/jsPDF,felipealbuquerq/jsPDF,adjetiva/jsPDF,jutunen/jsPDF-table_2,bartvde/jsPDF,spatialdatalogic/jsPDF,andrewhassan/jsPDF,Setasign/jsPDF,cjwilburn/jsPDF,daniel-z/jsPDF,spatialdatalogic/jsPDF,andrewhassan/jsPDF,gdseller/jsPDF,daniel-z/jsPDF,ProgrammerMatt/jsPDF,DockDogs/jsPDF,patrick-stevenok/jsPDF,DockDogs/jsPDF,gdseller/jsPDF,3t14/jsPDF,IlyasRidhuan/jsPDF,IlyasRidhuan/jsPDF,SpatialVision/jsPDF,cjwilburn/jsPDF,klarkc/jsPDF,bgarrels/jsPDF,trantu/jsPDF,u01jmg3/jsPDF,xuanhun/jsPDF,kjartab/jsPDF,Srikanth4/jsPDF,SpatialVision/jsPDF,hostrare/jsPDF,Devecoop/jsPDF,Setasign/jsPDF,Ju2ender/jsPDF,kjartab/jsPDF,3t14/jsPDF_ja,Nankym/jsPDF,DavidPhilip/jsPDF,IlyasRidhuan/jsPDF,spatialdatalogic/jsPDF,JunichiWatanuki/jsPDF,MrRio/jsPDF,spatialdatalogic/jsPDF,ProgrammerMatt/jsPDF,felipealbuquerq/jsPDF,Flamenco/jsPDF,andrewhassan/jsPDF,andrewhassan/jsPDF,trantu/jsPDF,hostrare/jsPDF,klarkc/jsPDF,ealves-pt/jsPDF,theDakotaCorbin/jsPDF,toddmoorega/jsPDF,bartvde/jsPDF,educostachaves/jsPDF,u01jmg3/jsPDF,wulanrahayu/jsPDF,felipealbuquerq/jsPDF