TYPO3 Core

Since the database result isn't being check for a result, PHP Warnings show up. It's suggested to check for a result and if nothing there, return a false, 0, or empty array back to the calling method. This way PHP warnings go away and we're properly checking incoming variables and returning defined negatory results.

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Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /home/cannon/local/typo3_src-4.1.1/t3lib/class.t3lib_db.php on line 796
Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /home/cannon/local/typo3_src-4.1.1/t3lib/class.t3lib_db.php on line 823
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Sample fixes.

In t3lib/class.t3lib_db.php
line 796, from `return mysql_fetch_assoc($res);`
to `return $res ? mysql_fetch_assoc($res) : array();`

line 823, from `return mysql_fetch_assoc($res);`
to `return $res ? mysql_fetch_assoc($res) : false;`

Anywhere a mysql_fetch* or like is being called, incoming variable should be checked to exist.
(issue imported from #M5722)