loader.php: fix includes again
loader.php: fix includes again

In 7e1f5ea6aad41 we fixed the fatal PHP error with non-Default type
games, but introduced another error where `get_file_loc` was not
defined when we needed to throw a back button / lost SN error.

I believe all the includes are in the right place now!

hemberger/smr,smrealms/smr,hemberger/smr,hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr