Disclaimer : this commit would need to be checked by someone

Change locale (LC_NUMERIC) in appropriate places so we always use the
user's locale when reading/writting floats to config (otherwise it would
read floats using C locale (float separator is . in C) and write them
using the user's local (float separator can be , instead of .))

If these changes aren't ok, then i think that the only solution would be
to always setlocale(LC_NUMERIC, "C") when handling config str<->float
conversions.

modules/gui/wxwidgets/wxwidgets.cpp

@@ -332,8 +332,9 @@ bool Instance::OnInit()
     locale.Init( wxLANGUAGE_DEFAULT );
 
     /* FIXME: The stream output mrl parsing uses ',' already so we want to
-     * keep the default '.' for floating point numbers. */
-    setlocale( LC_NUMERIC, "C" );
+     * keep the default '.' for floating point numbers.
+     * XXX (dionoea 13/08/2005) : This breaks prefs handling for floats
+     * setlocale( LC_NUMERIC, "C" ); */
 
     /* Load saved window settings */
     p_intf->p_sys->p_window_settings = new WindowSettings( p_intf );

src/libvlc.c

@@ -529,6 +529,9 @@ int VLC_Init( int i_object, int i_argc, char *ppsz_argv[] )
     /*
      * Override default configuration with config file settings
      */
+    /* (dionoea 13/08/2005) : we need to load locale here in order to have
+     * coherent float encoding with subsequent SaveConfigFile calls */
+    setlocale( LC_NUMERIC, "" );
     config_LoadConfigFile( p_vlc, NULL );
 
     /* Hack: insert the help module here */