diff -r 3b1da2848fc7 -r d3bac044e0f0 tools/designer/src/lib/shared/connectionedit_p.h
--- a/tools/designer/src/lib/shared/connectionedit_p.h	Fri Feb 19 23:40:16 2010 +0200
+++ b/tools/designer/src/lib/shared/connectionedit_p.h	Fri Mar 12 15:46:37 2010 +0200
@@ -87,7 +87,7 @@
     class EndPoint {
     public:
         enum Type { Source, Target };
-        EndPoint(Connection *_con = 0, Type _type = Source) : con(_con), type(_type) {}
+        explicit EndPoint(Connection *_con = 0, Type _type = Source) : con(_con), type(_type) {}
         bool isNull() const { return con == 0; }
         bool operator == (const EndPoint &other) const { return con == other.con && type == other.type; }
         bool operator != (const EndPoint &other) const { return !operator == (other); }