fix early return by mandel/simon-algo

Co-authored-by: Gabriel Lipnik <[email protected]>

Author: dkrenn

src/sage/combinat/regular_sequence_bounded.py

@@ -543,7 +543,8 @@ def regular_sequence_is_bounded(S):
         return False
 
     try:
-        return is_bounded_via_mandel_simon_algorithm(make_positive(matricesProd))
+        if not is_bounded_via_mandel_simon_algorithm(make_positive(matricesProd)):
+            return False
     except ValueError:
         pass