[clang] [SYCL] Correct incomplete AST visitation for UnresolvedSYCLKernelCallStmt. (PR #185531)

[Alexey Bader via cfe-commits]

================
@@ -845,6 +846,14 @@ class ASTNodeTraverser
     }
   }
 
+  void
+  VisitUnresolvedSYCLKernelCallStmt(const UnresolvedSYCLKernelCallStmt *Node) {
+    Visit(Node->getOriginalStmt());
+    if (Traversal != TK_IgnoreUnlessSpelledInSource) {
+      Visit(Node->getKernelLaunchIdExpr());
+    }
----------------
bader wrote:

To be fair the coding style in this file is inconsistent (the code 20 lines below):
```c++
  void VisitInitListExpr(const InitListExpr *ILE) {
    if (auto *Filler = ILE->getArrayFiller()) {
      Visit(Filler, "array_filler");
    }
  }

  void VisitCXXParenListInitExpr(const CXXParenListInitExpr *PLIE) {
    if (auto *Filler = PLIE->getArrayFiller()) {
      Visit(Filler, "array_filler");
    }
  }

  void VisitBlockExpr(const BlockExpr *Node) { Visit(Node->getBlockDecl()); }

  void VisitOpaqueValueExpr(const OpaqueValueExpr *Node) {
    if (Expr *Source = Node->getSourceExpr())
      Visit(Source);
  }
```

https://github.com/llvm/llvm-project/pull/185531