Make single arg ctor for UrlLink explicit

diff --git a/defs.h b/defs.h
index 3c752e7229dae673bc8f047140cd9339466a7cd6..35fa3d9a2bf04fd5088791073a5080054f4f10c3 100644 (file)
--- a/defs.h
+++ b/defs.h
@@ -213,7 +213,7 @@ public:
   UrlLink(QString url) :
     url_(std::move(url))
   { }
-  UrlLink(const char* url) :
+  explicit UrlLink(const char* url) :
     url_(url)
   { }
   UrlLink(QString url, QString url_link_text) :