Add better error handling for curses failures

tilde-train.py

@@ -346,4 +346,12 @@ train.append(pad_str)
 
 if __name__ == "__main__":
     signal(SIGINT, handler)
+    try:
       curses.wrapper(chuggachugga)
+    except curses.error as err:
+      print(
+        f"{err}\n"
+        "Couldn't print the train for some reason. "
+        "Maybe your terminal window is too short?"
+      )
+      sys.exit(1)