(muxparse_env): Always declare it, even if _JBLEN is undefined.

src/server/mux-parse.h

 /*
- * $Id: mux-parse.h,v 0.4 1992/02/26 18:45:04 ceder Exp $
+ * $Id: mux-parse.h,v 0.5 1993/10/10 16:37:42 ceder Exp $
  * Copyright (C) 1991  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -23,15 +23,13 @@
  * Please mail bug reports to bug-lyskom@lysator.liu.se. 
  */
 /*
- * $Id: mux-parse.h,v 0.4 1992/02/26 18:45:04 ceder Exp $
+ * $Id: mux-parse.h,v 0.5 1993/10/10 16:37:42 ceder Exp $
  *
  ** mux-parse.c                                    Handle the MUX protocol
  * This is a hack.
  */
  
-#ifdef _JBLEN
 extern jmp_buf mux_parse_env;
-#endif
 
 #define MUX_PROTOCOL_ERR 1
 #define MUX_MSG_INCOMPLETE 2