clang-tidy: fix implicit narrowing conversion

int to char is expected so cast; double to in was incorrect should
return double

alib2xml/src/primitive/xml/Character.cpp

@@ -9,7 +9,7 @@ char xmlApi < char >::parse ( ext::deque < sax::Token >::iterator & input) {
 	sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
 	int data = ext::from_string < int > ( sax::FromXMLParserHelper::popTokenData ( input, sax::Token::TokenType::CHARACTER ) );
 	sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, xmlTagName ( ) );
-	return data;
+	return static_cast < char > ( data );
 }
 bool xmlApi < char >::first ( const ext::deque < sax::Token >::const_iterator & input) {

alib2xml/src/primitive/xml/Double.cpp

@@ -5,7 +5,7 @@
 namespace core {
-int xmlApi < double >::parse ( ext::deque < sax::Token >::iterator & input ) {
+double xmlApi < double >::parse ( ext::deque < sax::Token >::iterator & input ) {
 	sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
 	double data = ext::from_string < double > ( sax::FromXMLParserHelper::popTokenData ( input, sax::Token::TokenType::CHARACTER ) );
 	sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, xmlTagName ( ) );

alib2xml/src/primitive/xml/Double.h

@@ -6,7 +6,7 @@ namespace core {
 template < >
 struct xmlApi < double > {
-	static int parse ( ext::deque < sax::Token >::iterator & input );
+	static double parse ( ext::deque < sax::Token >::iterator & input );
 	static bool first ( const ext::deque < sax::Token >::const_iterator & input );
 	static std::string xmlTagName ( );
 	static void compose ( ext::deque < sax::Token > & output, double data );