mined: increase the size of the tgetent() buffer.

From the termcap section of the GNU termutils manual:

"There is no way you can tell how much space is needed, so the convention
is to allocate a buffer 2048 characters long and assume that is enough.
(Formerly the convention was to allocate 1024 characters and assume that
was enough. But one day, for one kind of terminal, that was not
enough.)"

Change-Id: Ia5937366ae89e886dbaef7d180bee40669d0c488

minix/usr.bin/mined/mined1.c

@@ -1747,7 +1747,7 @@ void get_term(void)
   static char termbuf[50];
   extern char *tgetstr(), *getenv();
   char *loc = termbuf;
-  char entry[1024];
+  char entry[2048];
 
   if (tgetent(entry, getenv("TERM")) <= 0) {
   	printf("Unknown terminal.\n");