Deleted redundant memcpy.

ChangeLog

 2013-04-16  Niels Möller  <nisse@lysator.liu.se>
 
+	* umac-l2.c (_umac_l2): Deleted redundant memcpy.
+
 	* umac.h (umac32_ctx, umac64_ctx, umac96_ctx, umac128_ctx): Make
 	block count an uint64_t. Reorder some elements to put short values
 	together.

umac-l2.c

@@ -84,7 +84,6 @@ _umac_l2(const uint32_t *key, uint64_t *state, unsigned n,
 	    state[2*i+1] = 1;
 
 	    _umac_poly128 (key, state + 2*i, 0, y);
-	    memcpy (prev, m, n * sizeof(*m));
 	  }
       memcpy (prev, m, n * sizeof(*m));
     }