[gnome-2048] Fix crash due to not available colors

[Juan R. Garcia Blanco <juanrgar src gnome org>]

commit 445d6769678a6ea01c4d1395812d586a782d39f7
Author: Juan R. García Blanco <juanrgar gmail com>
Date:   Sun Feb 15 22:22:07 2015 +0100

    Fix crash due to not available colors
    
    Tiles up to 2048 are assigned colors, while tiles greater than that are
    not. The program crashed when such a tile needed to be displayed.
    
    A very simple algorithm has been added to deterministically generate
    colors based on the tile value and a pre-defined set of colors.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743119

 src/view.vala |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)
---
diff --git a/src/view.vala b/src/view.vala
index 3d0428d..aef124e 100644
--- a/src/view.vala
+++ b/src/view.vala
@@ -177,6 +177,23 @@ public class ColorPalette : GLib.Object
 
   public Clutter.Color pick_color (uint val)
   {
-    return _palette.get (val);
+    Clutter.Color color;
+
+    if (_palette.has_key (val)) {
+      color = _palette.get (val);
+    } else {
+      uint norm_val;
+      uint8 sbits;
+
+      norm_val = val / 2048;
+      color = _palette.get (norm_val);
+
+      sbits = (uint8)(val % 7);
+      color.red <<= sbits;
+      color.green <<= sbits;
+      color.blue <<= sbits;
+    }
+
+    return color;
   }
 }