multimedia/kodi: unbreak with clang 4.0

RssReader.cpp:269:19: error: ordered comparison between pointer and zero ('TiXmlElement *' and 'int')
  while (itemNode > 0)
         ~~~~~~~~ ^ ~
RssReader.cpp:273:22: error: ordered comparison between pointer and zero ('TiXmlNode *' and 'int')
    while (childNode > 0)
           ~~~~~~~~~ ^ ~

PR:		216075
Submitted by:	tcberner
Approved by:	maintainer timeout (2 weeks)

multimedia/kodi/files/patch-xbmc_utils_RssReader.cpp

@@ -0,0 +1,18 @@
+Fix bogus pointer comparisons.
+
+--- xbmc/utils/RssReader.cpp.orig	2017-01-21 21:11:51 UTC
++++ xbmc/utils/RssReader.cpp
+@@ -266,11 +266,11 @@ void CRssReader::GetNewsItems(TiXmlEleme
+   if (m_tagSet.empty())
+     AddTag("title");
+ 
+-  while (itemNode > 0)
++  while (itemNode)
+   {
+     TiXmlNode* childNode = itemNode->FirstChild();
+     mTagElements.clear();
+-    while (childNode > 0)
++    while (childNode)
+     {
+       std::string strName = childNode->ValueStr();
+