allow disabling anti-aliasing via cli flag

simply running nsxiv with `--anti-alias` will enable anti-aliasing, and
running it with `--anti-alias=no` will disable it.

the cli flag will overwrite the config.h default.

Closes: https://codeberg.org/nsxiv/nsxiv/issues/349

1 files changed, 1 insertions, 0 deletions

diff --git a/nsxiv.h b/nsxiv.h
index 7262e1e..17a28b0 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -237,6 +237,7 @@ struct opt {
 	scalemode_t scalemode;
 	float zoom;
 	bool animate;
+	bool aa;
 	int gamma;
 	int slideshow;
 	int framerate;