Fix bug preventing breakpoints from being deleted
Fix bug preventing breakpoints from being deleted

saisai/byebug,miamiruby/byebug,yui-knk/byebug,davidmowrer/in_class_projects_t2,miamiruby/byebug,ozydingo/byebug,scalp42/byebug,guilherme/byebug,edward/byebug,os97673/byebug,davidmowrer/in_class_projects_t2,guilherme/byebug,phusion/byebug,scalp42/byebug,davidmowrer/in_class_projects_t2,ozydingo/byebug,saisai/byebug,os97673/byebug,guilherme/byebug,deivid-rodriguez/byebug,yui-knk/byebug,yui-knk/byebug,icebreaker/byebug,k0kubun/byebug,k0kubun/byebug,k0kubun/byebug,phusion/byebug,webdev1001/byebug,webdev1001/byebug,deivid-rodriguez/byebug,icebreaker/byebug,deivid-rodriguez/byebug,edward/byebug