Make ObjCInterfaceDecl's const in some more places.

llvm-svn: 69775
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index a0f38af..32001ce 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/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);