Use buffer coordinates in isFoldedAtCursorRow
Use buffer coordinates in isFoldedAtCursorRow

This avoid an extra screen-to-buffer coordinate translation.

Signed-off-by: Nathan Sobo <2e8aa918660411855c6d44d5bb2da677aa033255@github.com>

CraZySacX/atom,brettle/atom,Mokolea/atom,FIT-CSE2410-A-Bombs/atom,decaffeinate-examples/atom,CraZySacX/atom,decaffeinate-examples/atom,stinsonga/atom,t9md/atom,PKRoma/atom,sotayamashita/atom,liuderchi/atom,andrewleverette/atom,AlexxNica/atom,CraZySacX/atom,atom/atom,sotayamashita/atom,Arcanemagus/atom,FIT-CSE2410-A-Bombs/atom,kevinrenaers/atom,liuderchi/atom,atom/atom,Arcanemagus/atom,FIT-CSE2410-A-Bombs/atom,AlexxNica/atom,liuderchi/atom,ardeshirj/atom,Mokolea/atom,sotayamashita/atom,andrewleverette/atom,andrewleverette/atom,stinsonga/atom,Arcanemagus/atom,t9md/atom,stinsonga/atom,t9md/atom,Mokolea/atom,brettle/atom,ardeshirj/atom,brettle/atom,decaffeinate-examples/atom,atom/atom,ardeshirj/atom,liuderchi/atom,kevinrenaers/atom,PKRoma/atom,stinsonga/atom,decaffeinate-examples/atom,PKRoma/atom,AlexxNica/atom,kevinrenaers/atom