Parameters not accessing uninitiated parsed functions array

`ReflectionBase::$parsedFunctions` was not being populated from `ParserResult::$functions`.

[Closes #423]
[Closes #437]
Min version is PHP 5.3 for now.
I'd like to either keep used standard or change this in whole app. Introducing duplicate approach crates smell.

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Just a note: In this case, better choice would be `getParsedFunction($name)` with check throwing exception  inside. `getParsed*s` are used on different places with temp variables.