[hackers] [sent] fix dying on empty slidefile || Markus Teich

[git]

commit eac14478e949e29e442922d997f057573ddd9923
Author:     Markus Teich <markus.te...@stusta.mhn.de>
AuthorDate: Wed Nov 18 23:24:53 2015 +0100
Commit:     Markus Teich <markus.te...@stusta.mhn.de>
CommitDate: Wed Nov 18 23:24:53 2015 +0100

    fix dying on empty slidefile

diff --git a/sent.c b/sent.c
index e68051f..f7cadb6 100644
--- a/sent.c
+++ b/sent.c
@@ -685,7 +685,7 @@ int main(int argc, char *argv[])
                }
        }
 
-       if (!slides || !slides[0].lines)
+       if (!slidecount)
                usage();
 
        xinit();