Remove redundant explicit default initialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194980 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 59a4842..14cf245 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -602,8 +602,8 @@
   // Find the __forwarding field and the variable field in the __Block_byref
   // struct.
   DIArray Fields = blockStruct.getTypeArray();
-  DIDescriptor varField = DIDescriptor();
-  DIDescriptor forwardingField = DIDescriptor();
+  DIDescriptor varField;
+  DIDescriptor forwardingField;
 
   for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
     DIDescriptor Element = Fields.getElement(i);