Make inclusion of tcl_bx.h unconditional

There's no need for the conditional compilation - tcl_bx.h itself has the WANT_TCL guards
necessary.

This makes generating the Makefile target dependencies easier.

source/ctcp.c

@@ -45,10 +45,7 @@ CVS_REVISION(ctcp_c)
 #include "misc.h"
 #include "userlist.h"
 #include "hash2.h"
-
-#ifdef WANT_TCL
 #include "tcl_bx.h"
-#endif
 
 #define MAIN_SOURCE
 #include "modval.h"