fix #1879. Similar to other cut in half issue.
fix #1879. Similar to other cut in half issue.

SereivoanYong/Charts,jjatie/Charts,liuxuan30/ios-charts,jum/Charts,MAARK/Charts,jjatie/Charts,liuxuan30/Charts,danielgindi/ios-charts,liuxuan30/Charts,danielgindi/Charts,MAARK/Charts,MAARK/Charts,danielgindi/Charts,hanquochan/Charts,danielgindi/ios-charts,icecrystal23/ios-charts,danielgindi/Charts,MAARK/Charts,liuxuan30/Charts,liuxuan30/Charts,danielgindi/ios-charts,FreddyZeng/Charts,jjatie/Charts,danielgindi/ios-charts,FreddyZeng/Charts,jum/Charts,hanquochan/Charts,liuxuan30/ios-charts,danielgindi/Charts,icecrystal23/ios-charts,hanquochan/Charts,SereivoanYong/Charts,icecrystal23/ios-charts,jjatie/Charts,liuxuan30/ios-charts,ConcepterDev/ios-charts,ConcepterDev/ios-charts,ConcepterDev/ios-charts,jum/Charts,FreddyZeng/Charts,FreddyZeng/Charts,SereivoanYong/Charts,icecrystal23/ios-charts,liuxuan30/ios-charts,hanquochan/Charts,jum/Charts