Error in the "_IsValidSource" method in Varien/Io/File.php

[felipegomesdev]

Hello.

After this change is part of the code (#966)

The SOAP API Feature of creating a product image has stopped working. Look documentation

Well, the whole image has a null value. For example:

$src = file_get_contents("https://pbs.twimg.com/media/EelBMRwXsAEcrM9.png");

if (strpos($src, chr(0)) === false){
    echo "success...";
}else {
    echo "error...";
}

Therefore, it is not possible to pass the _IsValidSource method in Varien/Io/File.php

Same problem at #1125