[hackers] [sbase] arg.h: fixed argv checks order || Lucas Gabriel Vuotto

[git]

commit bbacab561ce953c1e4620d5a42334ca9e9701331
Author:     Lucas Gabriel Vuotto <l.vuott...@gmail.com>
AuthorDate: Fri Feb 19 15:59:49 2016 -0300
Commit:     sin <s...@2f30.org>
CommitDate: Sat Feb 20 08:23:57 2016 +0000

    arg.h: fixed argv checks order
    
    This prevents accessing to a potentially out-of-bounds memory section.
    
    Signed-off-by: Lucas Gabriel Vuotto <l.vuott...@gmail.com>

diff --git a/arg.h b/arg.h
index de6ce94..0b23c53 100644
--- a/arg.h
+++ b/arg.h
@@ -10,8 +10,8 @@ extern char *argv0;
 
 /* use main(int argc, char *argv[]) */
 #define ARGBEGIN       for (argv0 = *argv, argv++, argc--;\
-                                       argv[0] && argv[0][1]\
-                                       && argv[0][0] == '-';\
+                                       argv[0] && argv[0][0] == '-'\
+                                       && argv[0][1];\
                                        argc--, argv++) {\
                                char argc_;\
                                char **argv_;\