new_level() redraws the whole screen, including the message line, so if
msg() has just been called, the message will likely not last long
enough to be noticed. These cases have been changed so that msg() is
called after new_level().
If a fall through a trapdoor is fatal, "You fall into a trap!" is no
longer printed, but the tombstone should make things clear.
Some sections of code that prompt the user for a string of input were
calling get_str() with cw (the player-visible screen containing the
map), which caused whatever the player typed to get printed starting at
cw's idea of the cursor position, which was usually the Rogue's @-sign.
This corrupted the map.
The problem has been fixed by passing msgw (the message line at the top
of the screen) to get_str(), so the player's typing appears where msgw
thinks the cursor should be, which is in the sensible place right after
the prompt. Some other get_str() invocations which used hw or stdscr
have been left unmodified.
