Fix fix_cue_in to work with liquidsoap 1.2

The previous syntax only worked with 1.1, this one should work on both.

python_apps/pypo/liquidsoap/ls_script.liq

@@ -45,26 +45,30 @@ def check_version(~version=liquidsoap.version, major, minor) =
     list.nth(v,0) > major or list.nth(v,0) == major and list.nth(v,1) >= minor
 end
 
+# cue cut fix for liquidsoap <1.2.2
+#
+# This was most likely broken on 1.1.1 (debian) as well.
+# 
+# adapted from https://github.com/savonet/liquidsoap/issues/390#issuecomment-277562081
+#
+def fix_cue_in(~cue_in_metadata='liq_cue_in', m) =
+    # 0.04 might need to be adjusted according to your frame size
+    if float_of_string(m[cue_in_metadata]) < 0.04 then
+        [(cue_in_metadata, "0")]
+    else
+        []
+    end
+end
+
 def create_source()
     l = request.equeue(id="s#{!source_id}", length=0.5)
 
     l = audio_to_stereo(id="queue_src", l)
 
-    # cue cut fix for liquidsoap <1.2.2
-    #
-    # This was most likely broken on 1.1.1 (debian) as well.
-    # 
-    # adapted from https://github.com/savonet/liquidsoap/issues/390#issuecomment-277562081
-    #
-    if not check_version(1, 3) then
-        l = map_metadata(fun (~cue_in_metadata='liq_cue_in', m) ->
-            # 0.04 might need to be adjusted according to your frame size
-            if float_of_string(m[cue_in_metadata]) < 0.04 then
-                [(cue_in_metadata, "0")]
-            else
-                []
-            end
-        end)
+    l = if not check_version(1, 3) then
+        map_metadata(fix_cue_in, l)
+    else
+        l
     end
     l = cue_cut(l)
     l = amplify(1., override="replay_gain", l)