[libclang] For CXXOperatorCallExprs, give a valid source location to the DeclRefExpr
that is referencing the member function, so we can index the referenced function.

Fixes rdar://10762375&10324915 & http://llvm.org/PR11192

llvm-svn: 150033
diff --git a/clang/tools/libclang/IndexBody.cpp b/clang/tools/libclang/IndexBody.cpp
index 08c7d18..c400491 100644
--- a/clang/tools/libclang/IndexBody.cpp
+++ b/clang/tools/libclang/IndexBody.cpp
@@ -90,6 +90,12 @@
     return true;
   }
 
+  bool TraverseCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
+    if (E->getOperatorLoc().isInvalid())
+      return true; // implicit.
+    return base::TraverseCXXOperatorCallExpr(E);
+  }
+
   bool VisitDeclStmt(DeclStmt *S) {
     if (IndexCtx.indexFunctionLocalSymbols())
       IndexCtx.indexDeclGroupRef(S->getDeclGroup());