fix (Stream) Fix the fatal error on parameter 2

[farpat]

Provide a narrative description of what you are trying to accomplish:

• [ x ] Are you fixing a bug?

When $length variable of Stream@read method is strictly a string (even if this one contains a number).

[Ocramius]

The API strictly declares the parameter to be an int, so do pass an integer to it.

Closing as invalid.

Please also consider installing a static analysis tool such as phpstan or psalm in your project, to prevent these issues upfront.

[farpat]

Thanks for response. As you talk, I must a PR on an other repository.

Thanks :)

[farpat]

For information, this fix is passed here : slimphp/Slim#2558