File xerces32_changes of Package cegui

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,7 +72,7 @@ endif()

 if ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang"))
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
-    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 elseif (NOT CMAKE_VERSION VERSION_LESS "3.1")
     set (CMAKE_C_STANDARD_REQUIRED TRUE)
     set (CMAKE_C_STANDARD "99")
--- a/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp
+++ b/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp
@@ -130,7 +130,7 @@ namespace CEGUI
                 processElement(childNode->ToElement());
                 break;
             case TiXmlNode::CEGUI_TINYXML_TEXT:
-                if (childNode->ToText()->Value() != '\0')
+                if (childNode->ToText()->Value() != nullptr)
                     d_handler->text((encoded_char*)childNode->ToText()->Value());
                 break;

--- a/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp
+++ b/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp
@@ -144,7 +144,7 @@ void RapidXMLDocument::processElement(co
             break;

         case rapidxml::node_data:
-            if (childNode->value() != '\0')
+            if (childNode->value() != nullptr)
                 d_handler->text(
                     reinterpret_cast<encoded_char*>(childNode->value()));