Import arg.h OOB fix from Lucas Gabriel Vuotto.

This is a small fix for arg.h where it's possible to perform an out-of-boundary
memory access in argv's internal string.

diff --git a/arg.h b/arg.h
index 4df77a701f443d2b9e91d90dd1a1405891986ff1..aeab52af9e374a0e97613cab8d124c92b14c4b0a 100644 (file)
--- 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_;\