[TYPO3-core] RFC #9285: Remove all @ in front of file_exists() calls

[Dmitry Dulepov [typo3]]

Hi!

Ingo Renner wrote:
> Problem:
> The use of the @ character in front of functions to surpress warnings 
> costs a lot of performance, and in case of file_exists() is not needed 
> anymore since a bug with this function throwing warnings has been fixed 
> in PHP in 2003 already.
> 
> Solution:
> remove the @ characters in front of file_exists()

-1 because it causes PHP warnings if file does not exist.

-- 
Dmitry Dulepov
TYPO3 Core team
My TYPO3 book: http://www.packtpub.com/typo3-extension-development/book
In the blog: http://typo3bloke.net/pages/book-reviews/presentation-zen-by-garr-reynolds/