The reason that warning appears is because you are using a custom storage class. Since it is a warning you don't actually need to fix it to run the code inspector, but it is letting you know that, depending on how it's defined, it may not work as intended.
Your options are
1) Go ahead and try code inspector regardless of the warning 2) Change the storage class
If you see anything that doesn't make sense later on in the process and it involves this parameter, you will be able to better figure out that this was the reason.