Set tmp_buf and rate_buf to something ridiculously high to fix a buffer
overflow when COLUMNS is large. - JeR

(Taken from gentoo portage)
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

--- a/src/ftop.c	2009-02-16 07:00:00.000000000 +0100
+++ b/src/ftop.c	2013-09-06 14:42:41.788852952 +0200
@@ -736,7 +736,7 @@
 {
     size_t i, j, bytes, bar_total;
     char more_procs_ch, more_files_ch, expanded_ch;
-    char tmp_buf[80], rate_buf[80];
+    char tmp_buf[2048], rate_buf[2048];
     char *tmp_str;
     snapshot *s, *s_prev;
     file_info *tmp_file;