add human theme to configure

configure.in

@@ -882,7 +882,7 @@ AC_ARG_WITH(vba-package-format,
 AC_ARG_WITH(theme,
     AS_HELP_STRING([--with-theme="theme1 theme2..."],
         [Choose which themes to include. By default those themes with an '*' are included.
-         Possible choices: *default, *crystal, *hicontrast, *oxygen, *tango, classic, industrial.]),
+         Possible choices: *default, *crystal, *hicontrast, *oxygen, *tango, classic, industrial, human.]),
 ,)
 
 AC_ARG_WITH(helppack-integration,
@@ -8753,7 +8753,7 @@ fi
 WITH_THEMES=""
 for theme in $with_theme; do
     case $theme in
-        default|crystal|hicontrast|oxygen|tango) : ;;
+        default|crystal|hicontrast|oxygen|tango|human) : ;;
         *) AC_MSG_ERROR([Unknown value for --with-theme: $theme]) ;;
     esac
     WITH_THEMES="$WITH_THEMES $theme"