Some compilers don't like x = {} where x is a boost::optional<string>

Fails on ubuntu 16 and debian 9.

diff --git a/src/asset.cc b/src/asset.cc
index b911c70b958435c754d2e153c58edc811789e18e..e68229033c8609b122423b7c44d8809b6dfb6242 100644 (file)
--- a/src/asset.cc
+++ b/src/asset.cc
@@ -162,7 +162,7 @@ void
 Asset::set_file (path file) const
 {
        _file = absolute (file);
-       _hash = {};
+       _hash = boost::optional<string>();
 }