1，修复安装脚本。

application/install/sql/install.sql

@@ -123,7 +123,7 @@ CREATE TABLE `mac_art` (
   `art_pic` varchar(255) NOT NULL DEFAULT '' ,
   `art_pic_thumb` varchar(255) NOT NULL DEFAULT '' ,
   `art_pic_slide` varchar(255) NOT NULL DEFAULT '' ,
-  `art_pic_screenshot` text DEFAULT  '',
+  `art_pic_screenshot` text NOT NULL,
   `art_blurb` varchar(255) NOT NULL DEFAULT '' ,
   `art_remarks` varchar(100) NOT NULL DEFAULT '' ,
   `art_jumpurl` varchar(150) NOT NULL DEFAULT '' ,
@@ -543,10 +543,10 @@ CREATE TABLE `mac_topic` (
   `topic_time_hits` int(10) unsigned NOT NULL DEFAULT '0' ,
   `topic_time_make` int(10) unsigned NOT NULL DEFAULT '0' ,
   `topic_tag` varchar(255) NOT NULL DEFAULT '' ,
-  `topic_rel_vod` text ,
-  `topic_rel_art` text ,
-  `topic_content` text ,
-  `topic_extend` text ,
+  `topic_rel_vod` text NOT NULL,
+  `topic_rel_art` text NOT NULL,
+  `topic_content` text NOT NULL,
+  `topic_extend` text NOT NULL,
   PRIMARY KEY (`topic_id`),
   KEY `topic_sort` (`topic_sort`) USING BTREE,
   KEY `topic_level` (`topic_level`) USING BTREE,
@@ -587,7 +587,7 @@ CREATE TABLE `mac_type` (
   `type_des` varchar(255) NOT NULL DEFAULT '' ,
   `type_title` varchar(255) NOT NULL DEFAULT '' ,
   `type_union` varchar(255) NOT NULL DEFAULT '',
-  `type_extend` text ,
+  `type_extend` text NOT NULL,
   `type_logo`  VARCHAR( 255 )  NOT NULL DEFAULT  '',
   `type_pic`  VARCHAR( 255 )  NOT NULL DEFAULT  '',
   `type_jumpurl`  VARCHAR( 150 )  NOT NULL DEFAULT  '',
@@ -697,7 +697,7 @@ CREATE TABLE `mac_vod` (
   `vod_pic` varchar(255) NOT NULL DEFAULT '' ,
   `vod_pic_thumb` varchar(255) NOT NULL DEFAULT '' ,
   `vod_pic_slide` varchar(255) NOT NULL DEFAULT '' ,
-  `vod_pic_screenshot` text DEFAULT  '',
+  `vod_pic_screenshot` text NOT NULL,
   `vod_actor` varchar(255) NOT NULL DEFAULT '' ,
   `vod_director` varchar(255) NOT NULL DEFAULT '' ,
   `vod_writer` varchar(100) NOT NULL DEFAULT '' ,
@@ -819,7 +819,7 @@ CREATE TABLE `mac_website` (
   `website_sort` int(10) NOT NULL DEFAULT '0',
   `website_jumpurl` varchar(255) NOT NULL DEFAULT '',
   `website_pic` varchar(255) NOT NULL DEFAULT '',
-  `website_pic_screenshot` text DEFAULT  '',
+  `website_pic_screenshot` text NOT NULL,
   `website_logo` varchar(255) NOT NULL DEFAULT '',
   `website_area` varchar(20) NOT NULL DEFAULT '',
   `website_lang` varchar(10) NOT NULL DEFAULT '',