4PointCutting: Really abort execution when markers don't specify a valid region (missing return statement)

4PointCutting/4Pcut_execute.lua

@@ -125,8 +125,10 @@ if edit_mode <= 0 then
     return
 elseif (edit_mode == 1 or edit_mode == 2 or edit_mode == 5) and (mark_srcin_pos >= mark_srcout_pos) then
     msg('SRC-IN Marker must be set left of SRC-OUT marker! Aborting.')
+    return
 elseif (edit_mode == 3 or edit_mode == 4 or edit_mode == 5) and (mark_dstin_pos >= mark_dstout_pos) then
     msg('DST-IN Marker must be set left of DST-OUT marker! Aborting.')
+    return
 end
 
 -- Do stuff before actual edits...