fix to string on char datatype

alib2std/src/extensions/string.cpp

@@ -46,6 +46,10 @@ std::string to_string ( double value ) {
 	return std::to_string ( value );
 }
+std::string to_string ( char value ) {
+	return std::string ( 1, value );
+}
+
 template < >
 std::string from_string ( const std::string & value ) {
 	return value;

alib2std/src/extensions/string.hpp

@@ -79,6 +79,7 @@ std::string to_string ( unsigned long long value );
 std::string to_string ( double value );
+std::string to_string ( char value );