Improve the patch for ming.rb. (Already sent to the author)

Define and use SWIG instead of hardcoding swig's executable name in a
patch.

graphics/ruby-ming/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	ming
 PORTVERSION=	0.0.2e
+PORTREVISION=	1
 CATEGORIES=	graphics ruby
 MASTER_SITES=	http://www.opaque.net/ming/
 PKGNAMEPREFIX=	${RUBY_PKGNAMEPREFIX}
@@ -24,8 +25,11 @@ MD5_FILE=	${PORTSDIR}/graphics/ming/distinfo
 
 WRKSRC=		${WRKDIR}/${DISTNAME}/rb_ext
 CONFIGURE_ARGS=	--with-ming-include="${LOCALBASE}/include/ming"
+MAKE_ARGS=	 SWIG="${SWIG}"
 INSTALL_TARGET=	site-install
 
+SWIG=		swig1.3
+
 EXAMPLES=	shape.rb test.rb
 
 post-extract:

graphics/ruby-ming/files/patch-depend

@@ -1,5 +1,5 @@
 --- depend.orig	Fri Oct 13 15:26:31 2000
-+++ depend	Mon Oct 16 17:55:07 2000
++++ depend	Tue Oct 17 17:46:26 2000
 @@ -1,4 +1,4 @@
 -SWIGINC= ../py_ext
 +SWIGINC= .
@@ -11,7 +11,7 @@
  
  ming_wrap.c: ${SWIGINC}/blocklist.i ${SWIGINC}/blocktypes.i ${SWIGINC}/ming.i ${SWIGINC}/swf.i
 -	swig -I${SWIGINC} -ruby ${SWIGINC}/ming.i
-+	swig1.3 -I${SWIGINC} -ruby ${SWIGINC}/ming.i
++	${SWIG} -I${SWIGINC} -ruby ${SWIGINC}/ming.i
  
  clean: clean_local