No hangup save while in tutorial

Tutorial code doesn't handle saving and reloading the game gracefully,
and manually saving has been disabled in there already.
Also disable automatic saving in the tutorial when the terminal goes away.

src/cmd.c

@@ -4924,6 +4924,9 @@ end_of_input(void)
     program_state.something_worth_saving = 0; /* don't save */
 #endif
 
+    if (In_tutorial(&u.uz))
+        program_state.something_worth_saving = 0; /* don't save in tutorial */
+
 #ifndef SAFERHANGUP
     if (!program_state.done_hup++)
 #endif