Merge pull request #685 from warmist/patch-4

Fix flag editing bug in gm-editor

scripts/gui/gm-editor.lua

@@ -174,6 +174,7 @@ function GmEditorUi:getSelectedEnumType()
     local trg=self:currentTarget()
     local trg_key=trg.keys[self.subviews.list_main:getSelected()]
     if trg.target._field==nil then return nil end
+    if trg.target:_field(trg_key)==nil then return nil end
     local enum=trg.target:_field(trg_key)._type
     if enum._kind=="enum-type" then
         return enum