metadata: translate "----" to "Unknown" in lens identification

(cherry picked from commit 9b0dce535c7eeda2d20c0ef1fa342b00238a48a1)
2019-07-07 18:00:24 +02:00
parent b01b0fbef0
commit 0e019b745b
1 changed files with 1 additions and 1 deletions
--- a/rtengine/imagedata.cc
+++ b/rtengine/imagedata.cc
@@ -265,7 +265,7 @@ FramesData::FramesData(const Glib::ustring &fname) :
        if (lens.empty()) {
            lens = "Unknown";
        }
-        if (lens.empty()) {
+        if (lens.empty() || lens.find_first_not_of('-') == std::string::npos) {
            lens = "Unknown";
        }