[jonah] Typo in channels.php

[Patrick Brossier]

«channelview» in forms must be changed in channelView like $channelView 
in channels.php and in templates/channels/edit.inc because you use:
    case JONAH_SHOW_CHANNEL :
        if ( $channelName ) {
            if ( Horde :: getFormData ('channelView' )) {

readfile ($conf ['paths' ][ 'data' ] . '/html/' .$channelName .'-' 
.$channelView .'.html' ); must be changed to:
echo String::convertCharset(Jonah::buildChannelDisplay($channelName, 
$channelView), 'UTF-8'); in line 161

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