Merge pull request #1797 from jbj/dataflow-TTwo

C++/C#/Java: data flow AccessPath up to length 2

Author: hvitved

cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll

@@ -219,7 +219,7 @@ Type getErasedRepr(Type t) {
 }
 
 /** Gets a string representation of a type returned by `getErasedRepr`. */
-string ppReprType(Type t) { result = t.toString() }
+string ppReprType(Type t) { none() } // stub implementation
 
 /**
  * Holds if `t1` and `t2` are compatible, that is, whether data can flow from