Fix KW10 issues

BZ: 186081

Due to upgrade klocwork (KW version from 9.6 to 10.0)
new issues have been raised.

This patch fix the new issues raised in PFW.

Change-Id: I54c14e4d6da1c9a5f8d82aec1769a9e7e948db50
Signed-off-by: Eduardo Mendi <eduardox.mendi@intel.com>
diff --git a/xmlserializer/XmlElement.cpp b/xmlserializer/XmlElement.cpp
index d0ab91a..bda3973 100644
--- a/xmlserializer/XmlElement.cpp
+++ b/xmlserializer/XmlElement.cpp
@@ -86,6 +86,9 @@
         return "";
     }
     xmlChar* pucXmlValue = xmlGetProp((xmlNode*)_pXmlElement, (const xmlChar*)strAttributeName.c_str());
+    if (pucXmlValue == NULL) {
+        return "";
+    }
 
     string strValue((const char*)pucXmlValue);
 
@@ -130,6 +133,9 @@
 string CXmlElement::getTextContent() const
 {
     xmlChar* pucXmlContent = xmlNodeGetContent(_pXmlElement);
+    if (pucXmlContent == NULL) {
+        return "";
+    }
 
     string strContent((const char*)pucXmlContent);