- TSPHP-535 NullPointer when type for constant is missing
-- fixed ATypeCheckWithParserErrorTest
-- Added catch clauses to TSPHPReferenceWalker in order that an erroneous type is created if the user has omitted the type
- TSPHP-651 NullPointer when type for variable is missing
-- Added catch clauses to TSPHPReferenceWalker in order that an erroneous type is created if the user has omitted the type
-- checkAssignment now checks for IErroneousVariableSymbol as well
-- changed TypeCheckPhaseControllerErroneousSymbolTest accordingly
-- no longer create an IErroneousVariableSymbol in case of a forward reference (better if more checks are done in conjunction with this variable)
- saw that ReturnErrorTest did not always cover methods (sometimes only functions) -> improved it