C++: Fix two bugs found by @rdmarsh2

Co-Authored-By: Robert Marsh <rdmarsh2@gmail.com>

cpp/ql/src/Security/CWE/CWE-134/UncontrolledFormatStringThroughGlobalVar.ql

@@ -34,6 +34,6 @@ where
   not taintedWithoutGlobals(arg) and
   taintedWithPath(userValue, arg, sourceNode, sinkNode) and
   isUserInput(userValue, cause)
-select arg,
+select arg, sourceNode, sinkNode,
   "The value of this argument may come from $@ and is being used as a formatting argument to " +
     printfFunction, userValue, cause

cpp/ql/src/semmle/code/cpp/ir/dataflow/DefaultTaintTracking.qll

@@ -489,7 +489,7 @@ module TaintedWithPath {
     }
   }
 
-  private class WrapPathNode extends PathNode, TPathNode {
+  private class WrapPathNode extends PathNode, TWrapPathNode {
     DataFlow3::PathNode inner() { this = TWrapPathNode(result) }
 
     override string toString() { result = this.inner().toString() }