Fix incorrect entity encoding, results in invalid XML.

Pointing this out by jsa@

Obtained from:	upstream

textproc/tinyxml/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	tinyxml
 PORTVERSION=	2.6.1
+PORTREVISION=	1
 CATEGORIES=	textproc
 MASTER_SITES=	SF
 DISTNAME=	${PORTNAME}_${PORTVERSION:S/./_/g}

textproc/tinyxml/files/patch-tinyxml.cpp

@@ -0,0 +1,34 @@
+--- tinyxml.cpp.orig	2010-03-23 13:16:36.000000000 +0800
++++ tinyxml.cpp	2010-07-26 15:28:06.000000000 +0800
+@@ -57,30 +57,7 @@
+ 	{
+ 		unsigned char c = (unsigned char) str[i];
+ 
+-		if (    c == '&' 
+-		     && i < ( (int)str.length() - 2 )
+-			 && str[i+1] == '#'
+-			 && str[i+2] == 'x' )
+-		{
+-			// Hexadecimal character reference.
+-			// Pass through unchanged.
+-			// &#xA9;	-- copyright symbol, for example.
+-			//
+-			// The -1 is a bug fix from Rob Laveaux. It keeps
+-			// an overflow from happening if there is no ';'.
+-			// There are actually 2 ways to exit this loop -
+-			// while fails (error case) and break (semicolon found).
+-			// However, there is no mechanism (currently) for
+-			// this function to return an error.
+-			while ( i<(int)str.length()-1 )
+-			{
+-				outString->append( str.c_str() + i, 1 );
+-				++i;
+-				if ( str[i] == ';' )
+-					break;
+-			}
+-		}
+-		else if ( c == '&' )
++		if ( c == '&' )
+ 		{
+ 			outString->append( entity[0].str, entity[0].strLength );
+ 			++i;