グラフ文字化け解消

下記を参考にVL-Gothicへ変更
http://d.hatena.ne.jp/shibainu55/20100416/1271640850

# cd /usr/share/zabbix/fonts/

# ln -s /usr/share/fonts/truetype/vlgothic/VL-Gothic-Regular.ttf
# ls
DejaVuSans.ttf  VL-Gothic-Regular.ttf

# diff -uNr defines.inc.php_20110706204323.bak  defines.inc.php 
--- defines.inc.php_20110706204323.bak  2011-07-06 20:43:23.000000000 +0900
+++ defines.inc.php     2011-07-06 20:50:45.000000000 +0900
@@ -48,13 +48,13 @@
        define('ZBX_POPUP_MAX_ROWS',                    20);
 
        define('ZBX_FONTPATH',                                  realpath('fonts'));     // where to search for font (GD > 2.0.18)
-       define('ZBX_GRAPH_FONT_NAME',                   'DejaVuSans');          // font file name
+       define('ZBX_GRAPH_FONT_NAME',                   'VL-Gothic-Regular');           // font file name
 
        define('ZBX_SCRIPT_TIMEOUT',                    360); // in seconds
        define('ZBX_SCRIPT_BYTES_LIMIT',                1073741824); // 1073741824 is 1MB in bytes
 /* END OF USERS DEFINES */
 
-       define('ZBX_FONT_NAME',                 'DejaVuSans');
+       define('ZBX_FONT_NAME',                 'VL-Gothic-Regular');
 
        define('ZBX_AUTH_INTERNAL',     0);
        define('ZBX_AUTH_LDAP',         1);