[libchamplain] Fix zoom level 0 not displayed

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit bcbb2913c673b92ddcad1b54a712c328abcaee28
Author: JiÅ?í Techet <techet gmail com>
Date:   Tue Mar 16 02:01:09 2010 +0100

    Fix zoom level 0 not displayed
    
    (One should be more careful when simplifying "obvious" things...)
    
    Signed-off-by: JiÅ?í Techet <techet gmail com>

 champlain/champlain-view.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/champlain/champlain-view.c b/champlain/champlain-view.c
index e50c8a7..e8f9d2d 100644
--- a/champlain/champlain-view.c
+++ b/champlain/champlain-view.c
@@ -2249,8 +2249,8 @@ view_load_visible_tiles (ChamplainView *view)
   gint arm_size, arm_max, spiral_pos;
   gint dirs[5] = {0, 1, 0, -1, 0};
 
-  i = x_first + x_count / 2 - 1;
-  j = y_first + y_count / 2 - 1;
+  i = x_first + (x_last - x_first) / 2 - 1;
+  j = y_first + (y_last - y_first) / 2 - 1;
   arm_max = MAX(x_last - x_first, y_last - y_first) + 2;
 
   for (arm_size = 1; arm_size < arm_max; arm_size += 2)