Revert "Another fix for lz4_decompress.c"

This reverts commit 7b948fbbc705cbdac1adf8dc2fb55d1bcf7e59a3.
Revert "Fix for lz4_decompress.c"

This reverts commit 8051a45f3bc664ea0def9c442f8325f846a2c601.
Revert "There is one other possible overrun in the lz4 code as implemented by linux at this point in time. As pointed out by Don, we also need to check the overflow in the data itself."

This reverts commit d45da39c840fa0f25dae5c015c8287f3feb235ef.
Revert "Given some pathologically compressed data, lz4 could possibly decide to wrap a few internal variables, causing unknown things to happen. Catch this before the wrapping happens and abort the decompression."

This reverts commit 3fec0a5abe87962ae5e720c79849e7aafe0e34da.