[TASK][DB] Increase length of tt_content CType

The length of the CType file is often too small to contain the name of
the extension that creates a new content element type. It should be
increased from 30 to 255.

Resolves: #43062
Releases: 6.0

Change-Id: I5ac23f7bdaa40ea9764d08ee330883da5be5a1ef
Reviewed-on: http://review.typo3.org/16560
Reviewed-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn

typo3/sysext/cms/ext_tables.sql

@@ -278,7 +278,7 @@ CREATE TABLE tt_content (
   cruser_id int(11) unsigned DEFAULT '0' NOT NULL,
   hidden tinyint(4) unsigned DEFAULT '0' NOT NULL,
   sorting int(11) unsigned DEFAULT '0' NOT NULL,
-  CType varchar(30) DEFAULT '' NOT NULL,
+  CType varchar(255) DEFAULT '' NOT NULL,
   header varchar(255) DEFAULT '' NOT NULL,
   header_position varchar(6) DEFAULT '' NOT NULL,
   bodytext mediumtext,