rbd_mirror/ImageReplayer.h: pass by reference const std::string

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

src/tools/rbd_mirror/ImageReplayer.h

@@ -61,7 +61,7 @@ class ImageReplayer {
 
     BootstrapParams() {}
     BootstrapParams(const std::string &local_pool_name,
-		    const std::string local_image_name) :
+		    const std::string &local_image_name) :
       local_pool_name(local_pool_name),
       local_image_name(local_image_name) {}
   };