[hackers] [sent] initialize .img || Szabolcs Nagy

[git]

commit 4ca44387e65a96a93b56ed1491f5f90c5e25d948
Author:     Szabolcs Nagy <n...@port70.net>
AuthorDate: Mon Nov 9 02:58:26 2015 +0100
Commit:     Markus Teich <markus.te...@stusta.mhn.de>
CommitDate: Tue Nov 10 16:55:22 2015 +0100

    initialize .img
    
    without the attached patch ./sent example segfaults here

diff --git a/sent.c b/sent.c
index 1b3b8f2..fb0b56e 100644
--- a/sent.c
+++ b/sent.c
@@ -394,6 +394,8 @@ void load(FILE *fp)
                        die("cannot strdup %u bytes:", strlen(buf)+1);
                if (slides[i].text[0] == '@')
                        slides[i].img = pngopen(slides[i].text + 1);
+               else
+                       slides[i].img = 0;
                i++;
        }
        if (slides)