UniXML: use const for read only funcs

include/UniXML.h

@@ -127,11 +127,11 @@ class UniXML_iterator
 		{}
 		UniXML_iterator() {}
 
-		std::string getProp(const std::string name);
-		std::string getPropUtf8(const std::string name);
-		int getIntProp(const std::string name);
+		std::string getProp(const std::string name) const;
+		std::string getPropUtf8(const std::string name) const;
+		int getIntProp(const std::string name) const;
 		/// if value if not positive ( <= 0 ), returns def
-		int getPIntProp(const std::string name, int def);
+		int getPIntProp(const std::string name, int def) const;
 		void setProp(const std::string name, const std::string text);
 		
 		/*!    .  false,    */

src/Various/UniXML.cc

@@ -450,24 +450,24 @@ bool UniXML_iterator::goChildren()
 }
 
 // -------------------------------------------------------------------------		
-string UniXML_iterator::getProp( const string name )
+string UniXML_iterator::getProp( const string name ) const
 {
 	return UniXML::getProp(curNode, name);
 }
 
 // -------------------------------------------------------------------------
-string UniXML_iterator::getPropUtf8( const string name )
+string UniXML_iterator::getPropUtf8( const string name ) const
 {
 	return UniXML::getPropUtf8(curNode, name);
 }
 
 // -------------------------------------------------------------------------
-int UniXML_iterator::getIntProp( const string name )
+int UniXML_iterator::getIntProp( const string name ) const
 {
 	return UniSetTypes::uni_atoi((char*)::xmlGetProp(curNode, (const xmlChar*)name.c_str()));
 }
 
-int UniXML_iterator::getPIntProp( const string name, int def )
+int UniXML_iterator::getPIntProp( const string name, int def ) const
 {
 	int i = getIntProp(name);
 	if (i <= 0)