* grub-core/normal/datetime.c (grub_get_weekday): Use unsigned types.

ChangeLog

@@ -1,3 +1,7 @@
+2013-11-08  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/normal/datetime.c (grub_get_weekday): Use unsigned types.
+
 2013-11-08  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/gfxmenu/gui_circular_progress.c (parse_angle):

grub-core/normal/datetime.c

@@ -34,7 +34,7 @@ static const char *const grub_weekday_names[] =
 int
 grub_get_weekday (struct grub_datetime *datetime)
 {
-  int a, y, m;
+  unsigned a, y, m;
 
   a = (14 - datetime->month) / 12;
   y = datetime->year - a;