bugfix: boehm GC improvements
bugfix: boehm GC improvements

gokr/Nim,singularperturbation/Nim,douglas-larocca/Nim,jsanjuas/Nim,zachaysan/Nim,jfhg/Nim,sferik/Nim,msmith491/Nim,bvssvni/Nim,singularperturbation/Nim,gokr/Nim,mbaulch/Nim,nanoant/Nim,douglas-larocca/Nim,zachaysan/Nim,Matt14916/Nim,Salafit/Nim,russpowers/Nim,judofyr/Nim,tmm1/Nim,SSPkrolik/Nim,sarvex/Nim-lang,bvssvni/Nim,haiodo/Nim,Dhertz/Nim,msmith491/Nim,endragor/Nim,jsanjuas/Nim,JCavallo/Nim,endragor/Nim,Senketsu/Nim,xland/Nim,mbaulch/Nim,Dhertz/Nim,fredericksilva/Nim,russpowers/Nim,douglas-larocca/Nim,nanoant/Nim,Dhertz/Nim,SSPkrolik/Nim,haiodo/Nim,dom96/Nim,endragor/Nim,douglas-larocca/Nim,sferik/Nim,reactormonk/nim,jsanjuas/Nim,sarvex/Nim-lang,Matt14916/Nim,fredericksilva/Nim,jsanjuas/Nim,dom96/Nim,Salafit/Nim,BlaXpirit/nim,reactormonk/nim,singularperturbation/Nim,SSPkrolik/Nim,judofyr/Nim,jfhg/Nim,haiodo/Nim,sarvex/Nim-lang,tmm1/Nim,tmm1/Nim,kirbyfan64/Nim,russpowers/Nim,fmamud/Nim,jsanjuas/Nim,fredericksilva/Nim,gokr/Nim,douglas-larocca/Nim,BlaXpirit/nim,bvssvni/Nim,sferik/Nim,Dhertz/Nim,reactormonk/nim,greyanubis/Nim,msmith491/Nim,russpowers/Nim,endragor/Nim,tulayang/Nim,jsanjuas/Nim,BlaXpirit/nim,kirbyfan64/Nim,fredericksilva/Nim,msmith491/Nim,tmm1/Nim,jfhg/Nim,singularperturbation/Nim,fmamud/Nim,msmith491/Nim,kirbyfan64/Nim,JCavallo/Nim,russpowers/Nim,Matt14916/Nim,reactormonk/nim,nimLuckyBull/Nim,tmm1/Nim,jfhg/Nim,sarvex/Nim-lang,mbaulch/Nim,nafsaka/Nim,mbaulch/Nim,dom96/Nim,Senketsu/Nim,greyanubis/Nim,judofyr/Nim,MrJohz/Nim,SSPkrolik/Nim,fredericksilva/Nim,zachaysan/Nim,sarvex/Nim-lang,sferik/Nim,nafsaka/Nim,nanoant/Nim,fmamud/Nim,Senketsu/Nim,douglas-larocca/Nim,xland/Nim,Dhertz/Nim,reactormonk/nim,zachaysan/Nim,fmamud/Nim,JCavallo/Nim,nafsaka/Nim,singularperturbation/Nim,sferik/Nim,gokr/Nim,Senketsu/Nim,Dhertz/Nim,Salafit/Nim,nafsaka/Nim,SSPkrolik/Nim,kirbyfan64/Nim,greyanubis/Nim,Senketsu/Nim,Salafit/Nim,fmamud/Nim,MrJohz/Nim,BlaXpirit/nim,bvssvni/Nim,nimLuckyBull/Nim,nanoant/Nim,dom96/Nim,mbaulch/Nim,msmith491/Nim,sarvex/Nim-lang,tulayang/Nim,BlaXpirit/nim,JCavallo/Nim,singularperturbation/Nim,tulayang/Nim,Matt14916/Nim,Matt14916/Nim,douglas-larocca/Nim,nanoant/Nim,nafsaka/Nim,judofyr/Nim,Matt14916/Nim,nimLuckyBull/Nim,mbaulch/Nim,Dhertz/Nim,gokr/Nim,kirbyfan64/Nim,xland/Nim,dom96/Nim,Matt14916/Nim,tulayang/Nim,sferik/Nim,haiodo/Nim,judofyr/Nim,endragor/Nim,fmamud/Nim,nimLuckyBull/Nim,judofyr/Nim,sferik/Nim,kirbyfan64/Nim,xland/Nim,greyanubis/Nim,nafsaka/Nim,msmith491/Nim,fmamud/Nim,jsanjuas/Nim,Senketsu/Nim,Salafit/Nim,sferik/Nim,fredericksilva/Nim,tmm1/Nim,greyanubis/Nim,MrJohz/Nim,endragor/Nim,bvssvni/Nim,douglas-larocca/Nim,xland/Nim,jfhg/Nim,tulayang/Nim,nimLuckyBull/Nim,xland/Nim,BlaXpirit/nim,gokr/Nim,nafsaka/Nim,JCavallo/Nim,dom96/Nim,endragor/Nim,tulayang/Nim,kirbyfan64/Nim,Salafit/Nim,judofyr/Nim,SSPkrolik/Nim,bvssvni/Nim,zachaysan/Nim,JCavallo/Nim,mbaulch/Nim,reactormonk/nim,reactormonk/nim,haiodo/Nim,gokr/Nim,dom96/Nim,BlaXpirit/nim,Salafit/Nim,MrJohz/Nim,MrJohz/Nim,MrJohz/Nim,SSPkrolik/Nim,kirbyfan64/Nim,fredericksilva/Nim,gokr/Nim,Senketsu/Nim,singularperturbation/Nim,haiodo/Nim,nimLuckyBull/Nim,russpowers/Nim,reactormonk/nim,zachaysan/Nim,fredericksilva/Nim,nanoant/Nim,xland/Nim,nimLuckyBull/Nim,russpowers/Nim,nanoant/Nim,MrJohz/Nim,SSPkrolik/Nim,sarvex/Nim-lang,jfhg/Nim,BlaXpirit/nim,JCavallo/Nim,zachaysan/Nim,tmm1/Nim,greyanubis/Nim,greyanubis/Nim,haiodo/Nim,jfhg/Nim,bvssvni/Nim,judofyr/Nim