Fix misleading error message in CashBuyingPowerModel with market orders
Fix misleading error message in CashBuyingPowerModel with market orders

Fixes #1764

JKarathiya/Lean,AnshulYADAV007/Lean,Jay-Jay-D/LeanSTP,AnshulYADAV007/Lean,jameschch/Lean,AlexCatarino/Lean,Jay-Jay-D/LeanSTP,QuantConnect/Lean,JKarathiya/Lean,Jay-Jay-D/LeanSTP,redmeros/Lean,StefanoRaggi/Lean,kaffeebrauer/Lean,redmeros/Lean,kaffeebrauer/Lean,jameschch/Lean,kaffeebrauer/Lean,AnshulYADAV007/Lean,AlexCatarino/Lean,JKarathiya/Lean,jameschch/Lean,kaffeebrauer/Lean,QuantConnect/Lean,JKarathiya/Lean,StefanoRaggi/Lean,AnshulYADAV007/Lean,AnshulYADAV007/Lean,Jay-Jay-D/LeanSTP,Jay-Jay-D/LeanSTP,redmeros/Lean,jameschch/Lean,AlexCatarino/Lean,QuantConnect/Lean,jameschch/Lean,QuantConnect/Lean,redmeros/Lean,StefanoRaggi/Lean,kaffeebrauer/Lean,StefanoRaggi/Lean,StefanoRaggi/Lean,AlexCatarino/Lean