What is the ruling on an injury inflicted by a slave upon his master if the injury does not mandate retaliation (qawad)?

Primary text

If the injury inflicted by a slave upon his master is not one that necessitates retaliation (qawad), such as accidental injury, شبه العمد (quasi-intentional injury), or destruction of property, the injury is considered immaterial (hadar). This is because the slave is property belonging to the master, and thus the slave cannot establish a financial right against his own property (the master's holding in the slave).