[clang] [clang-tools-extra] [clangd] Fix crash with null check for Token at Loc (PR #94528)

[Utkarsh Saxena via cfe-commits]

================
@@ -447,7 +447,7 @@ class HighlightingsBuilder {
     if (!RLoc.isValid())
       return;
 
-    const auto *RTok = TB.spelledTokenAt(RLoc);
+    const auto *RTok = TB.spelledTokenContaining(RLoc);
----------------
usx95 wrote:

Done.

https://github.com/llvm/llvm-project/pull/94528