Unbreak VC++ build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31464 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index c5b4c3c..e1c4c7d 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -23,7 +23,8 @@
   class Record;
   class DagInit;
 
-  struct CodeGenInstruction {
+  class CodeGenInstruction {
+  public:
     Record *TheDef;            // The actual record defining this instruction.
     std::string Name;          // Contents of the 'Name' field.
     std::string Namespace;     // The namespace the instruction is in.