C#: More fixup.

Author: michaelnebel

csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll

@@ -906,14 +906,14 @@ private predicate fieldOrPropertyStore(Expr e, ContentSet c, Expr src, Expr q, b
   )
 }
 
-private predicate patternPropertyRead(Expr e1, ContentSet c, LabeledPatternExpr e2) {
+private predicate patternPropertyRead(Expr e1, ContentSet c, VariablePatternExpr e2) {
   exists(IsExpr ie, RecursivePatternExpr p, TypeAccess ta, Property prop |
     e1 = ie.getExpr() and
     p = ie.getPattern() and
     ta = p.getTypeAccess() and
     e2 = p.getPropertyPatterns().getPattern(_) and
     prop.getDeclaringType() = ta.getType() and
-    prop.getName() = e2.getLabel() and
+    prop.getName() = e2.(LabeledPatternExpr).getLabel() and
     c.isProperty(prop)
   )
 }