* grub-core/term/gfxterm.c: Avoid division by zero.

ChangeLog

+2015-01-20  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/term/gfxterm.c: Avoid division by zero.
+
 2015-01-20  Vladimir Serbinenko  <phcoder@gmail.com>
 	Avoid division by zero in serial.

grub-core/term/gfxterm.c

@@ -221,6 +221,8 @@ grub_virtual_screen_setup (unsigned int x, unsigned int y,
     calculate_normal_character_width (virtual_screen.font);
   virtual_screen.normal_char_height =
     grub_font_get_max_char_height (virtual_screen.font);
+  if (virtual_screen.normal_char_height == 0)
+    virtual_screen.normal_char_height = 16;
   virtual_screen.cursor_x = 0;
   virtual_screen.cursor_y = 0;
   virtual_screen.cursor_state = 1;