Reduce max_preview_size to avoid pygments's awful performance hit.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/web/trunk@4294 92316355-f0b4-4df1-b90c-862c8a59935f

trac/conf/trac.ini

@@ -53,7 +53,7 @@ roadmap = disabled
 [mimeviewer]
 enscript_modes = text/x-dylan:dylan:4
 enscript_path = enscript
-max_preview_size = 2621440
+max_preview_size = 262144
 mime_map = text/x-dylan:dylan,text/x-idl:ice,text/x-ada:ads:adb
 php_path = php
 silvercity_modes =