render_con: fix height rounding in aspect ratio computation

With a 484x292 window and proportion of 488x294, new_height is
291.590164 after the loop, causing a rounding issue leading to a window
of 484x291.

diff --git a/src/render.c b/src/render.c
index 6061838a15e0e97d09b3ef8a726f5ff23ef40c1f..c0a0fedfe4848b70c6b3c229fbe760115cd2b67b 100644 (file)
--- a/src/render.c
+++ b/src/render.c
@@ -184,10 +184,10 @@ void render_con(Con *con, bool render_fullscreen) {
                     new_width--;
             }
             /* Center the window */
-            inset->y += ceil(inset->height / 2) - floor(new_height / 2);
+            inset->y += ceil(inset->height / 2) - floor((new_height + .5) / 2);
             inset->x += ceil(inset->width / 2) - floor(new_width / 2);
 
-            inset->height = new_height;
+            inset->height = new_height + .5;
             inset->width = new_width;
         }