Fix condition for when the block buffer is full.

ChangeLog

+2013-04-06  Niels Möller  <nisse@lysator.liu.se>
+
+	From Edgar E. Iglesias:
+	* sha3.c (_sha3_update): Fix condition for when the block buffer
+	is full.
+
 2013-04-04  Niels Möller  <nisse@lysator.liu.se>
 
 	* ecc-point.c (ecc_point_get): Allow NULL x or y, ignore

sha3.c

@@ -61,7 +61,7 @@ _sha3_update (struct sha3_state *state,
   if (pos > 0)
     {
       unsigned left = block_size - pos;
-      if (length < pos)
+      if (length < left)
 	{
 	  memcpy (block + pos, data, length);
 	  return pos + length;