Match declaration to definition (missed a few).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75456 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachOWriter.h b/lib/CodeGen/MachOWriter.h
index e8e5793..e5c7ee6 100644
--- a/lib/CodeGen/MachOWriter.h
+++ b/lib/CodeGen/MachOWriter.h
@@ -24,9 +24,9 @@
   class Mangler;
   class MachineRelocation;
   class MachOCodeEmitter;
-  class MachODySymTab;
-  class MachOHeader;
-  class MachOSection;
+  struct MachODySymTab;
+  struct MachOHeader;
+  struct MachOSection;
   struct MachOSym;
   class TargetData;
   class TargetMachine;