Fix some struct/class specifier mismatches.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92550 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombine.h b/lib/Transforms/InstCombine/InstCombine.h
index 7e20be4..635d627 100644
--- a/lib/Transforms/InstCombine/InstCombine.h
+++ b/lib/Transforms/InstCombine/InstCombine.h
@@ -20,9 +20,9 @@
 namespace llvm {
   class CallSite;
   class TargetData;
-  class DbgDeclareInst;
-  class MemIntrinsic;
-  class MemSetInst;
+  struct DbgDeclareInst;
+  struct MemIntrinsic;
+  struct MemSetInst;
   
 /// SelectPatternFlavor - We can match a variety of different patterns for
 /// select operations.