[hackers] [quark] fix segfault on parsing of -v and -m || Josuah Demangeon

[git]

commit 69bb7710eb9bcc73dd0836b9b88228259c9586d3
Author:     Josuah Demangeon <m...@josuah.net>
AuthorDate: Mon Apr 2 02:54:59 2018 +0200
Commit:     Laslo Hunhold <d...@frign.de>
CommitDate: Mon Apr 2 09:53:41 2018 +0200

    fix segfault on parsing of -v and -m
    
    The length is initially 0 so it needs to be incremented before
    reallocarray to avoid ...alloc(0); and keep some space for the element
    to insert.

diff --git a/main.c b/main.c
index 9985d31..5f1c6d9 100644
--- a/main.c
+++ b/main.c
@@ -166,7 +166,7 @@ main(int argc, char *argv[])
                if (!(tok = strdup(EARGF(usage())))) {
                        die("strdup:");
                }
-               if (!(s.vhost = reallocarray(s.vhost, s.vhost_len++,
+               if (!(s.vhost = reallocarray(s.vhost, ++s.vhost_len,
                                             sizeof(struct vhost)))) {
                        die("reallocarray:");
                }
@@ -182,7 +182,7 @@ main(int argc, char *argv[])
                if (!(tok = strdup(EARGF(usage())))) {
                        die("strdup:");
                }
-               if (!(s.map = reallocarray(s.map, s.map_len++,
+               if (!(s.map = reallocarray(s.map, ++s.map_len,
                                           sizeof(struct map)))) {
                        die("reallocarray:");
                }