If compiling shared ngspice, don't set up a terminal.

src/frontend/terminal.c

@@ -43,7 +43,7 @@ Author: 1986 Wayne A. Christopher, U. C. Berkeley CAD Group
 bool out_moremode = FALSE;
 bool out_isatty = TRUE;
 
-#ifndef TCL_MODULE
+#if !defined (TCL_MODULE) && !defined (SHARED_MODULE)
 
 #ifdef HAVE_TERMCAP
 static char *motion_chars;