Make ObjCInterfaceDecl's const in some more places.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index a0f38af..32001ce 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -623,7 +623,7 @@
   LValue EmitConditionalOperator(const ConditionalOperator *E);
   LValue EmitCastLValue(const CastExpr *E);
 
-  llvm::Value *EmitIvarOffset(ObjCInterfaceDecl *Interface,
+  llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
                               const ObjCIvarDecl *Ivar);
   LValue EmitLValueForField(llvm::Value* Base, FieldDecl* Field,
                             bool isUnion, unsigned CVRQualifiers);