workaround against ttrss_enclosures mysql data being wrong (nukes the enclosures table)

sanity_check.php

@@ -2,7 +2,7 @@
 	require_once "functions.php";
 
 	define('EXPECTED_CONFIG_VERSION', 18);
-	define('SCHEMA_VERSION', 55);
+	define('SCHEMA_VERSION', 56);
 
 	if (!file_exists("config.php")) {
 		print "<b>Fatal Error</b>: You forgot to copy 

schema/ttrss_schema_mysql.sql

@@ -225,7 +225,7 @@ create table ttrss_tags (id integer primary key auto_increment,
 
 create table ttrss_version (schema_version int not null) TYPE=InnoDB;
 
-insert into ttrss_version values (55);
+insert into ttrss_version values (56);
 
 create table ttrss_enclosures (id serial not null primary key,
 	content_url text not null,

schema/ttrss_schema_pgsql.sql

@@ -201,7 +201,7 @@ create index ttrss_tags_owner_uid_index on ttrss_tags(owner_uid);
 
 create table ttrss_version (schema_version int not null);
 
-insert into ttrss_version values (55);
+insert into ttrss_version values (56);
 
 create table ttrss_enclosures (id serial not null primary key,
 	content_url text not null,

schema/versions/mysql/56.sql

@@ -0,0 +1,16 @@
+begin;
+
+drop table ttrss_enclosures;
+
+create table ttrss_enclosures (id serial not null primary key,
+	content_url text not null,
+	content_type varchar(250) not null,
+	post_id integer not null,
+	title text not null,
+	duration text not null,
+	index (post_id),
+	foreign key (post_id) references ttrss_entries(id) ON DELETE cascade) TYPE=InnoDB;
+
+update ttrss_version set schema_version = 56;
+
+commit;

schema/versions/pgsql/56.sql

@@ -0,0 +1,5 @@
+begin;
+
+update ttrss_version set schema_version = 56;
+
+commit;