Patch siphash-1.0.3

patches/siphash-1.0.3.patch

+diff --git a/Crypto/MAC/SipHash.hs b/Crypto/MAC/SipHash.hs
+index ac1da7a..d86e3f5 100644
+--- a/Crypto/MAC/SipHash.hs
++++ b/Crypto/MAC/SipHash.hs
+@@ -27,6 +27,7 @@ import Foreign.ForeignPtr
+ import Foreign.Ptr
+ import Foreign.Storable
+ import System.Endian (fromLE64)
++import System.IO.Unsafe (unsafeDupablePerformIO)
+ 
+ -- | SigHash Key
+ data SipKey = SipKey {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
+@@ -43,7 +44,7 @@ hash = hashWith 2 4
+ 
+ -- | same as 'hash', except also specifies the number of sipround iterations for compression and digest.
+ hashWith :: Int -> Int -> SipKey -> ByteString -> SipHash
+-hashWith c d key (PS ps s fl) = inlinePerformIO $ withForeignPtr ps (\ptr -> runHash (initSip key) (ptr `plusPtr` s) fl)
++hashWith c d key (PS ps s fl) = unsafeDupablePerformIO $ withForeignPtr ps (\ptr -> runHash (initSip key) (ptr `plusPtr` s) fl)
+     where runHash !st !ptr l
+                 | l > 7     = fromLE64 `fmap` peek (castPtr ptr) >>= \v -> runHash (process st v) (ptr `plusPtr` 8) (l-8)
+                 | otherwise = do