Fix member hiding warnings.

Fixes #35.

Author: vprus

include/boost/program_options/detail/cmdline.hpp

@@ -136,7 +136,7 @@ namespace boost { namespace program_options { namespace detail {
                       const std::vector<style_parser>& style_parsers);
 
         // Copies of input.
-        std::vector<std::string> args;
+        std::vector<std::string> m_args;
         style_t m_style;
         bool m_allow_unregistered;
 

src/cmdline.cpp

@@ -103,7 +103,7 @@ namespace boost { namespace program_options { namespace detail {
     void
     cmdline::init(const vector<string>& args)
     {
-        this->args = args;        
+        this->m_args = args;        
         m_style = command_line_style::default_style;
         m_desc = 0;
         m_positional = 0;
@@ -244,6 +244,7 @@ namespace boost { namespace program_options { namespace detail {
         style_parsers.push_back(boost::bind(&cmdline::parse_terminator, this, _1));
 
         vector<option> result;
+        vector<string>& args = m_args;
         while(!args.empty())
         {
             bool ok = false;