If the page size is wrong on the page1 content inside a WAL file, then

If the page size is wrong on the page1 content inside a WAL file, then
running VACUUM could trigger an assert().  This check-in changes that assert()
into a branch that returns SQLITE_CORRUPT.
[forum:/info/4ef9b37d74d2d2e8|Forum post 4ef9b37d74d2d2e8]

FossilOrigin-Name: 0512f82a2cde7447cb348d9fd620f39f2f0e359141903cde20f7ba30b5d34af3