fixed two typos in variable names

Hi Pablo,

I can't tell you when this causes an error, it's just very obvious that the one variable "$inheritanceReferencesMany" has a typo and the other "$continueSearchingInheritance" is also a typo or an error from refactoring, because the var is never used while "$continueSearchingInheritable" is there to break the while loop. I don't know your code good enough to understand when this code would be called an therefor fail.

Best regards, Anton