cmdcount_t

Add a type to force g.{command_count,last_command_count,multi} to have the
same type (because cmd.c: g.multi = g.command_count;) and some resulting
cleanup.

src/cmd.c

@@ -4795,7 +4795,7 @@ get_count(
     char *allowchars,
     char inkey,
     long maxcount,
-    long *count,
+    cmdcount_t *count,
     boolean historicmsg) /* whether to include in ^P history: True => yes */
 {
     char qbuf[QBUFSZ];