core: Make converting constructors explicit where applicable

Avoids unwanted implicit conversions. Thankfully, given the large amount
of cleanup in past PRs, only this tiny amount is left over to cover.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/core/tracer/recorder.h b/src/core/tracer/recorder.h
index 629c2f6d2..e1cefd5fe 100644
--- a/src/core/tracer/recorder.h
+++ b/src/core/tracer/recorder.h
@@ -32,7 +32,7 @@ public:
      * Recorder constructor
      * @param initial_state Initial recorder state
      */
-    Recorder(const InitialState& initial_state);
+    explicit Recorder(const InitialState& initial_state);
 
     /// Finish recording of this Citrace and save it using the given filename.
     void Finish(const std::string& filename);