From b49517b73705e69d401925658ae0657b8a98b6a6 Mon Sep 17 00:00:00 2001
From: "Thiago Marcos P. Santos" <tmpsantos@gmail.com>
Date: Fri, 27 Mar 2020 18:30:35 +0200
Subject: [core] Fix performance-unnecessary-value-param errors in header files

As reported by clang-tidy-8.
---
 src/mbgl/renderer/image_manager_observer.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/mbgl/renderer/image_manager_observer.hpp')

diff --git a/src/mbgl/renderer/image_manager_observer.hpp b/src/mbgl/renderer/image_manager_observer.hpp
index c2ca481d66..947c5a36bc 100644
--- a/src/mbgl/renderer/image_manager_observer.hpp
+++ b/src/mbgl/renderer/image_manager_observer.hpp
@@ -8,7 +8,7 @@ class ImageManagerObserver {
 public:
     virtual ~ImageManagerObserver() = default;
 
-    virtual void onStyleImageMissing(const std::string&, std::function<void()> done) { done(); }
+    virtual void onStyleImageMissing(const std::string&, const std::function<void()>& done) { done(); }
     virtual void onRemoveUnusedStyleImages(const std::vector<std::string>&) {}
 };
 
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