[clang-tidy] cpp: Turn reference operators to const

Found with cppcoreguidelines-c-copy-assignment-signature

Signed-off-by: Rosen Penev <rosenp@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/plist/Data.h b/include/plist/Data.h
index a100d28..b566a6c 100644
--- a/include/plist/Data.h
+++ b/include/plist/Data.h
@@ -34,7 +34,7 @@ public :
     Data(Node* parent = NULL);
     Data(plist_t node, Node* parent = NULL);
     Data(const Data& d);
-    Data& operator=(Data& b);
+    Data& operator=(const Data& b);
     Data(const std::vector<char>& buff);
     virtual ~Data();