Add expression to build the eboard chess client

pkgs/games/eboard/default.nix

@@ -0,0 +1,19 @@
+{ stdenv, fetchurl, pkgconfig, gtk }:
+
+stdenv.mkDerivation {
+  name = "eboard-1.1.1";
+  
+  src = fetchurl {
+    url = mirror://sourceforge/eboard/eboard-1.1.1.tar.bz2;
+    sha256 = "0vm25j1s2zg1lipwjv9qrcm877ikfmk1yh34i8f5l3bwd63115xd";
+  };
+
+  patches = [ ./eboard.patch ];
+
+  buildInputs = [ pkgconfig gtk ];
+
+  meta = {
+    homepage = http://www.bergo.eng.br/eboard/;
+    description = "eboard is a chess interface for Unix-like systems";
+  };
+}

pkgs/games/eboard/eboard.patch

@@ -0,0 +1,16 @@
+--- a/cimg.cc	2014-05-25 02:41:58.000000000 -0500
++++ b/cimg.cc	2014-05-25 02:42:31.000000000 -0500
+@@ -94,11 +94,11 @@
+       ct == PNG_COLOR_TYPE_GRAY_ALPHA)
+     png_set_gray_to_rgb(pngp);
+
+-  alloc(pngp->width,pngp->height);
++  alloc(png_get_image_width(pngp, infp),png_get_image_height(pngp, infp));
+   if (!ok) { fclose(f); return; }
+   ok = 0;
+
+-  for(i=0;i<pngp->height;i++) {
++  for(i=0;i<png_get_image_height(pngp, infp);i++) {
+     png_read_row(pngp, (png_bytep) (&data[i*rowlen]), NULL);
+   }
+

pkgs/top-level/all-packages.nix

@@ -9889,6 +9889,8 @@ let
 
   d2x_rebirth = callPackage ../games/d2x-rebirth { };
 
+  eboard = callPackage ../games/eboard { };
+
   eduke32 = callPackage ../games/eduke32 { };
 
   egoboo = callPackage ../games/egoboo { };