* Correctly patch alloca() usage. Upstream has been contacted for
  resolution.

* this:
tty.c: In function 'tty_start':
tty.c:64:18: error: 'ECHO' undeclared (first use in this function); did you mean 'O_ECHO'?
 #  define O_ECHO ECHO
                  ^
tty.c:184:49: note: in expansion of macro 'O_ECHO'
     ttyb.sg_flags = (ttyb.sg_flags|O_CBREAK) & ~O_ECHO;
                                                 ^~~~~~
tty.c:64:18: note: each undeclared identifier is reported only once for each function it appears in
 #  define O_ECHO ECHO
									                  ^
tty.c:184:49: note: in expansion of macro 'O_ECHO'
     ttyb.sg_flags = (ttyb.sg_flags|O_CBREAK) & ~O_ECHO;
                                                 ^~~~~~

