Don't print default values for NumberOfAuxSymbols and AuxiliaryData.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183293 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/COFFYAML.cpp b/lib/Object/COFFYAML.cpp
index 6e8dad4..e3c2a45 100644
--- a/lib/Object/COFFYAML.cpp
+++ b/lib/Object/COFFYAML.cpp
@@ -255,8 +255,9 @@
   IO.mapRequired("SimpleType", S.SimpleType);
   IO.mapRequired("ComplexType", S.ComplexType);
   IO.mapRequired("StorageClass", NS->StorageClass);
-  IO.mapOptional("NumberOfAuxSymbols", S.Header.NumberOfAuxSymbols);
-  IO.mapOptional("AuxiliaryData", S.AuxiliaryData);
+  IO.mapOptional("NumberOfAuxSymbols", S.Header.NumberOfAuxSymbols,
+                 (uint8_t) 0);
+  IO.mapOptional("AuxiliaryData", S.AuxiliaryData, object::yaml::BinaryRef());
 }
 
 void MappingTraits<COFFYAML::Section>::mapping(IO &IO, COFFYAML::Section &Sec) {