util/ScopeExit: copy enabled tag in move constructor

src/util/ScopeExit.hxx

@@ -45,7 +45,7 @@ public:
 	explicit ScopeExitGuard(F &&f):F(std::forward<F>(f)) {}
 
 	ScopeExitGuard(ScopeExitGuard &&src)
-		:F(std::move(src)) {
+		:F(std::move(src)), enabled(src.enabled) {
 		src.enabled = false;
 	}