[hackers] [sbase] tr: fix "isdigit" check || Hiltjo Posthuma

[git]

commit bfcf46ac5eae942a123498c0aa356ee9f647ba72
Author: Hiltjo Posthuma <hil...@codemadness.org>
Date:   Mon Apr 20 21:17:53 2015 +0200

    tr: fix "isdigit" check

diff --git a/tr.c b/tr.c
index 83d7b69..9ec9640 100644
--- a/tr.c
+++ b/tr.c
@@ -125,14 +125,13 @@ nextbrack:
                                factor = 1;
                                base = (rstr[i + 3] == '0') ? 8 : 10;
                                for (n = j - 1; n > i + 2; n--) {
-                                       if (rstr[n] < '0' && rstr[n] > '9') {
+                                       if (rstr[n] < '0' || rstr[n] > '9') {
                                                n = 0;
                                                break;
                                        }
                                        q += (rstr[n] - '0') * factor;
                                        factor *= base;
                                }
-
                                if (n == 0) {
                                        j = m + 1;
                                        goto nextbrack;