Fixed issue: Extension column not wide enough for long extensions

CHANGELOG

@@ -1,3 +1,8 @@
+queXS 1.16.0 - Changes since 1.15.10
+
+
+
+ALTER TABLE `extension` CHANGE `extension` `extension` CHAR( 20 ) NOT NULL;
 ALTER TABLE `sample_var` ADD INDEX ( `var_id` );
 
 queXS 1.15.10 - Changes since 1.15.9