[clangd] Fix using the incorrect Index for go-to-definition.

Reviewers: sammccall

Subscribers: ilya-biryukov, ioeric, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D47869

llvm-svn: 334176

clang-tools-extra/clangd/ClangdServer.cpp

@@ -302,7 +302,7 @@ void ClangdServer::findDefinitions(PathRef File, Position Pos,
                             llvm::Expected<InputsAndAST> InpAST) {
     if (!InpAST)
       return CB(InpAST.takeError());
-    CB(clangd::findDefinitions(InpAST->AST, Pos, this->FileIdx.get()));
+    CB(clangd::findDefinitions(InpAST->AST, Pos, Index));
   };
 
   WorkScheduler.runWithAST("Definitions", File, Bind(Action, std::move(CB)));