[locale] Fix GeoIP (reported by demm, crazy)

- data has already been read, don't try to read more from the QNM reply
 - regression introduced in 7e25909e

src/modules/locale/LocaleViewStep.cpp

@@ -120,7 +120,7 @@ LocaleViewStep::fetchGeoIpTimezone()
 
             try
             {
-                YAML::Node doc = YAML::Load( reply->readAll() );
+                YAML::Node doc = YAML::Load( data );
 
                 QVariant var = CalamaresUtils::yamlToVariant( doc );
                 if ( !var.isNull() &&