[ewiki] bugfix: plugins/meta/f_title | bug

Hi!

And yet again I've been testing the latest CVS. Title!=pagename works. Great! 
Here's what's still buggy:

##F_TITLE

"htmlentities" has been misspelled "htmlentitites" in line 12 of 
plugins/meta/f_title.php

##META

## warning

I get the following warning after hitting the "edit" button:

  Warning: in_array() [function.in-array]: Wrong datatype for second argument 
  in /neuro/vol/neuro/web/htdocs/cms/plugins/meta/meta.php on line 41
                 
w/ line 41 being:
 
  if (!in_array($ewiki_config["meta"]["keep_string"], $id)) {

## bug or feature

When erasing all text entered in the meta-field, the meta-data is NOT erased, 
i.e. "once meta-data, always meta-data", e.g. if you've entered "title: 
NewName" then you have to do "title: OldName" to go back to the initial 
state.

Solong, Timm

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