make hide work all at once

macros/garret.dupe-and-comment.lua

@@ -51,11 +51,15 @@ end
 
 local function hide(subs, sel)
     for i=#sel,1,-1 do
-        local edit=subs[sel[i]]
-        local original=subs[sel[i]+1]
-        edit.extra.dupencom = json.encode(original)
-        subs.delete(sel[i]+1)
-        subs[sel[i]] = edit
+        local orig=subs[sel[i]]
+        if orig.comment then
+            edit = subs[sel[i]-1]
+            edit.extra.dupencom = json.encode(orig)
+            subs[sel[i] - 1] = edit
+            subs.delete(sel[i])
+        else
+            break
+        end
     end
     aegisub.set_undo_point("Hide comments")
 end