[C++11] Use 'nullptr'. Tools edition.

llvm-svn: 210422
diff --git a/clang/tools/libclang/IndexBody.cpp b/clang/tools/libclang/IndexBody.cpp
index fbec3d7..7dc53a62 100644
--- a/clang/tools/libclang/IndexBody.cpp
+++ b/clang/tools/libclang/IndexBody.cpp
@@ -170,7 +170,7 @@
   if (!S)
     return;
 
-  if (DC == 0)
+  if (!DC)
     DC = Parent->getLexicalDeclContext();
   BodyIndexer(*this, Parent, DC).TraverseStmt(const_cast<Stmt*>(S));
 }