import return from StdFunc (return will be removed from StdEnv)

backend/backendconvert.icl

@@ -3,6 +3,7 @@ implementation module backendconvert
 import code from library "backend_library"
 
 import StdEnv, compare_types
+from StdFunc import return
 import frontend
 import backend
 import backendsupport, backendpreprocess

frontend/comparedefimp.icl

 implementation module comparedefimp
 
+from StdFunc import return
 import syntax, checksupport, compare_constructor, utilities, compare_types
 
 ::	CompareState =