Description:
------------
fclose is not enough to dereference file

Reproduce code:
---------------
This WORKED before:
.... php code here ....
	// The file that the transfer should be written to, $fp is open file handle in writing(binary) mode
	curl_setopt($this->ch, CURLOPT_FILE, $fp);

	// Store image to file
	curl_exec($this->ch);

	// Close /path/temp/image.tmp
	fclose($fp);

	// HERE IS A CATCH!
	rename(/path/temp/image.tmp, /path/temp/image.tmp.png);

Expected result:
----------------
To rename a file

Actual result:
--------------
NOW, it issues error and DOES NOT rename file:
Warning: rename(/path/temp/image.tmp, /path/temp/image.tmp.png) [function.rename]: No such file or directory in /path/script.php on line 53536440


FIX: adding unset()!
.... php code here ....
	unset($fp);
	
	// HERE IS A CATCH!
	rename(/path/temp/image.tmp, /path/temp/image.tmp.png);
	
Problem: In 5.2 it worked without unset($fp); code line!