Cygwin: pty: Set console code page only if pseudo console is enabled.

- Input UTF-8 chars are garbled in ConEmu with cygwin connector if
  the environment does not support pseudo console. This patch fixes
  the issue.

winsup/cygwin/fhandler_tty.cc

@@ -2626,6 +2626,8 @@ fhandler_pty_slave::setup_locale (void)
   LCID lcid = get_langinfo (locale, charset);
 
   /* Set console code page form locale */
+  if (get_pseudo_console ())
+    {
       UINT code_page;
       if (lcid == 0 || lcid == (LCID) -1)
 	code_page = 20127; /* ASCII */
@@ -2635,6 +2637,7 @@ fhandler_pty_slave::setup_locale (void)
 	code_page = 20127; /* ASCII */
       SetConsoleCP (code_page);
       SetConsoleOutputCP (code_page);
+    }
 
   /* Set terminal code page from locale */
   /* This code is borrowed from mintty: charset.c */