4PointCutting: Only try to crossfade if SWS is present

4PointCutting/4Pcut_execute.lua

@@ -176,12 +176,14 @@ select_dst_track_only()
 reaper.Main_OnCommand(40058, 0) -- paste item 
 --reaper.Main_OnCommand( reaper.NamedCommandLookup('_SWS_AWPASTE'), 0 ) -- SWS Paste
 -- Crossfade (only with SWS extensions, "fill gaps")
-reaper.Main_OnCommand( 40290, 0 ) -- set time selection to selected items 
-reaper.Main_OnCommand( 40320, 0 ) -- nudge left edge of time selection left
-reaper.Main_OnCommand( 40323, 0 ) -- nudge right edge of time selection right
-reaper.Main_OnCommand( 40718, 0 ) -- select items on selected tracks and in time selection
-reaper.Main_OnCommand( reaper.NamedCommandLookup('_SWS_AWFILLGAPSQUICKXFADE'), 0 )  --  fill gaps between selected items and crossfade
--- Move dstin marker according to edit mode
+if sws_present then
+    reaper.Main_OnCommand( 40290, 0 ) -- set time selection to selected items 
+    reaper.Main_OnCommand( 40320, 0 ) -- nudge left edge of time selection left
+    reaper.Main_OnCommand( 40323, 0 ) -- nudge right edge of time selection right
+    reaper.Main_OnCommand( 40718, 0 ) -- select items on selected tracks and in time selection
+    reaper.Main_OnCommand( reaper.NamedCommandLookup('_SWS_AWFILLGAPSQUICKXFADE'), 0 )  --  fill gaps between selected items and crossfade
+end
+    -- Move dstin marker according to edit mode
 if edit_mode == 1 then 
     reaper.SetProjectMarker(mark_dstin_id, false, mark_dstin_pos + (mark_srcout_pos - mark_srcin_pos), 0, 'DST-IN_4Pcut')
 elseif edit_mode == 2 then