libclang: type safety for CXTranslationUnitImpl::CIdx


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173590 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/Indexing.cpp b/tools/libclang/Indexing.cpp
index 4a51e32..6f01a0b 100644
--- a/tools/libclang/Indexing.cpp
+++ b/tools/libclang/Indexing.cpp
@@ -759,7 +759,7 @@
   if (!client_index_callbacks || index_callbacks_size == 0)
     return;
 
-  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
+  CIndexer *CXXIdx = TU->CIdx;
   if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
     setThreadBackgroundPriority();