fix potential truncation of cli arguments (#367)

strtol() returns a `long`, but we're storing the result in an `int`
which might end up getting truncated. change `n` to `long` and guard
against >INT_MAX arguments in cases where it matters.

use a float for storing argument of `-S`

change `opt.slideshow` to `unsigned` similar to `img.ss.delay`

Co-authored-by: Berke Kocaoğlu <berke.kocaoglu@metu.edu.tr>
Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/367
Reviewed-by: Berke Kocaoğlu <berke.kocaoglu@metu.edu.tr>
Reviewed-by: explosion-mental <explosion-mental@noreply.codeberg.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/nsxiv.h b/nsxiv.h
index 2dc1783..7bf7e25 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -239,7 +239,7 @@ struct opt {
 	bool animate;
 	bool anti_alias;
 	int gamma;
-	int slideshow;
+	unsigned int slideshow;
 	int framerate;
 
 	/* window: */