[gthumb] get zoomed size: rounding seems more accurate

[Paolo Bacchilega <paobac src gnome org>]

commit e74eb573fbc56f4409671fba8079b3af2e9bfb54
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Jan 2 11:52:28 2016 +0100

    get zoomed size: rounding seems more accurate

 gthumb/gth-image-viewer.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gthumb/gth-image-viewer.c b/gthumb/gth-image-viewer.c
index 9e19fb7..e9410fd 100644
--- a/gthumb/gth-image-viewer.c
+++ b/gthumb/gth-image-viewer.c
@@ -250,8 +250,8 @@ _gth_image_viewer_get_zoomed_size_for_zoom (GthImageViewer *self,
        }
        else {
                int frame_border = _gth_image_viewer_get_frame_border (self);
-               if (width != NULL) *width  = (int) floor ((double) self->priv->original_width * zoom_level) + 
(frame_border * 2);
-               if (height != NULL) *height = (int) floor ((double) self->priv->original_height * zoom_level) 
+ (frame_border * 2);
+               if (width != NULL) *width  = (int) round ((double) self->priv->original_width * zoom_level) + 
(frame_border * 2);
+               if (height != NULL) *height = (int) round ((double) self->priv->original_height * zoom_level) 
+ (frame_border * 2);
        }
 }