Updated homebrew formula for coin3d to fix xcode build issue on OSX 10.9

coin.rb

require 'formula'

class Coin < Formula
  homepage 'https://bitbucket.org/Coin3D/coin/wiki/Home'
  url 'https://bitbucket.org/Coin3D/coin/downloads/Coin-3.1.3.tar.gz'
  sha1 '8e9f05628461963623686d3ec53102214e233dd1'

  def install
    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}",
                          "--with-framework-prefix=#{lib}"
    system "make install"
  end

  def patches
    # Fixes xcode build issue on 10.9
    # https://github.com/mxcl/homebrew/issues/23782
    DATA
  end

end

__END__
diff --git a/include/Inventor/C/base/math-undefs.h b/include/Inventor/C/base/math-undefs.h
index 5b9e7f2..e288592 100644
--- a/include/Inventor/C/base/math-undefs.h
+++ b/include/Inventor/C/base/math-undefs.h
@@ -40,6 +40,12 @@
   work as intended.  20070518 larsa
 */
 
+/* Turned off due to xcode build issue on OS 10.9
+   issue: https://github.com/mxcl/homebrew/issues/23782
+   also see: 
+    http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/graphics/Coin/patches/patch-include_Inventor_C_base_math-undefs.h
+*/
+#if 0
 #undef cosf
 #define cosf(x) NO_SINGLEPREC /* whatever that'll give us a compile error... */
 #undef sinf
@@ -58,6 +64,7 @@
 #define atanf(x) NO_SINGLEPREC
 #undef atan2f
 #define atan2f(x) NO_SINGLEPREC
+#endif
 
 /* *********************************************************************** */