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

llvm-svn: 208517
diff --git a/clang/lib/AST/TemplateBase.cpp b/clang/lib/AST/TemplateBase.cpp
index 52f95bf..d7ae73c 100644
--- a/clang/lib/AST/TemplateBase.cpp
+++ b/clang/lib/AST/TemplateBase.cpp
@@ -248,7 +248,7 @@
     break;
 
   case Declaration:
-    ID.AddPointer(getAsDecl()? getAsDecl()->getCanonicalDecl() : 0);
+    ID.AddPointer(getAsDecl()? getAsDecl()->getCanonicalDecl() : nullptr);
     break;
 
   case Template:
@@ -386,7 +386,7 @@
   }
     
   case Expression:
-    getAsExpr()->printPretty(Out, 0, Policy);
+    getAsExpr()->printPretty(Out, nullptr, Policy);
     break;
     
   case Pack:
@@ -489,7 +489,7 @@
     LangOptions LangOpts;
     LangOpts.CPlusPlus = true;
     PrintingPolicy Policy(LangOpts);
-    Arg.getAsExpr()->printPretty(OS, 0, Policy);
+    Arg.getAsExpr()->printPretty(OS, nullptr, Policy);
     return DB << OS.str();
   }