Update ruby-gnuplot to 2.4.1.

2.4.1
 * Quote escape more strings. Thanks for the tip!

2.4.0
 * Allow for 3D plots, fix examples. Thanks everybody!

graphics/ruby-gnuplot/Makefile

@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.4 2011/06/19 01:37:30 taca Exp $
+# $NetBSD: Makefile,v 1.5 2012/03/21 15:42:23 taca Exp $
 
-DISTNAME=	gnuplot-2.3.6
+DISTNAME=	gnuplot-2.4.1
 CATEGORIES=	graphics
 
 MAINTAINER=	[email protected]

graphics/ruby-gnuplot/PLIST

@@ -1,12 +1,14 @@
-@comment $NetBSD: PLIST,v 1.6 2011/06/19 01:37:30 taca Exp $
+@comment $NetBSD: PLIST,v 1.7 2012/03/21 15:42:24 taca Exp $
 ${GEM_HOME}/cache/${GEM_NAME}.gem
 ${GEM_LIBDIR}/AUTHORS.txt
 ${GEM_LIBDIR}/ChangeLog
 ${GEM_LIBDIR}/LICENSE.txt
 ${GEM_LIBDIR}/README.textile
 ${GEM_LIBDIR}/Rakefile
 ${GEM_LIBDIR}/examples/.gitignore
+${GEM_LIBDIR}/examples/3d_surface_plot.rb
 ${GEM_LIBDIR}/examples/discrete_points.rb
+${GEM_LIBDIR}/examples/histogram.rb
 ${GEM_LIBDIR}/examples/multiple_data_sets.rb
 ${GEM_LIBDIR}/examples/output_image_file.rb
 ${GEM_LIBDIR}/examples/sin_wave.rb

graphics/ruby-gnuplot/distinfo

@@ -1,5 +1,5 @@
-$NetBSD: distinfo,v 1.4 2011/06/19 01:37:30 taca Exp $
+$NetBSD: distinfo,v 1.5 2012/03/21 15:42:24 taca Exp $
 
-SHA1 (gnuplot-2.3.6.gem) = 92265dc2c8c0157eee618acd56f0d21dc7281dfb
-RMD160 (gnuplot-2.3.6.gem) = 7cc6edc6f0fb309cd5f299027f8d4159774080ee
-Size (gnuplot-2.3.6.gem) = 12800 bytes
+SHA1 (gnuplot-2.4.1.gem) = 2b5eb32da6cfafa73a3bc4b59650234e2f740beb
+RMD160 (gnuplot-2.4.1.gem) = c8a17d5265c4763c87dc03c99eb60b2a9aef4e6e
+Size (gnuplot-2.4.1.gem) = 13312 bytes