seaman: fix the case when no recorders are needed

seaman.py

@@ -265,11 +265,12 @@ class SeaManager(ServiceManager):
             args = ' '.join(recorders.get(k, '0') for k in ('main', 'stick', 'addons'))
             conn.send(f'seauser seaser\nconfig listen 1\nsea_recorder {args}\n'.encode())
             conn.settimeout(2)
-            prev = b''
+            if args != '0 0 0':
-            while True:
+                prev = b''
-                lines = (prev + conn.recv(999)).split(b'\n')
+                while True:
-                prev = lines.pop()
+                    lines = (prev + conn.recv(999)).split(b'\n')
-                if b'ACTIVE' in lines:
+                    prev = lines.pop()
-                    break
+                    if b'ACTIVE' in lines:
+                        break
         finally:
             conn.close()