[gthumb] calculate scaled image size correctly

[Paolo Bacchilega <paobac src gnome org>]

commit f6092b8b685e2cdb5e52756d2a57ae8f912e3fd3
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Jun 29 16:03:58 2013 +0200

    calculate scaled image size correctly
    
    truncate the value instead of rounding it.

 gthumb/gth-image-dragger.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gthumb/gth-image-dragger.c b/gthumb/gth-image-dragger.c
index 559e87b..9b6d8eb 100644
--- a/gthumb/gth-image-dragger.c
+++ b/gthumb/gth-image-dragger.c
@@ -431,8 +431,8 @@ _gth_image_dragger_update_scaled_image (GthImageDragger *self)
        if (zoom >= 1.0)
                return;
 
-       new_width = round (zoom * image_width);
-       new_height = round (zoom * image_height);
+       new_width = zoom * image_width;
+       new_height = zoom * image_height;
 
        /*self->priv->scaled = _cairo_image_surface_scale_nearest (image, new_width, new_height);*/
        self->priv->scaled = _cairo_image_surface_scale_bilinear (image, new_width, new_height);