signals: exclude the crash handler from the tiny version

The tiny version contains much less code, so is less likely
to crash.  And the users most likely use it for very simple
and short editing jobs, making the chance of a crash still
smaller.  So the handler would just be bloat.

src/nano.c

@@ -1215,7 +1215,7 @@ void signal_init(void)
 #endif
 	}
 
-#ifndef DEBUG
+#if !defined(NANO_TINY) && !defined(DEBUG)
 	if (getenv("NANO_NOCATCH") == NULL) {
 		/* Trap SIGSEGV and SIGABRT to save any changed buffers and reset
 		 * the terminal to a usable state.  Reset these handlers to their
@@ -1234,7 +1234,7 @@ RETSIGTYPE handle_hupterm(int signal)
 	die(_("Received SIGHUP or SIGTERM\n"));
 }
 
-#ifndef DEBUG
+#if !defined(NANO_TINY) && !defined(DEBUG)
 /* Handler for SIGSEGV (segfault) and SIGABRT (abort). */
 RETSIGTYPE handle_crash(int signal)
 {