Define LZ4_STREAMSIZE in terms of LZ4_MEMORY_USAGE

This is required to correctly size a static member
to hold the hash table, whose size is derived from
LZ4_MEMORY_USAGE.

lib/lz4.h

@@ -620,7 +620,7 @@ typedef struct {
  *  note : only use this definition in association with static linking !
  *  this definition is not API/ABI safe, and may change in future versions.
  */
-#define LZ4_STREAMSIZE       16416  /* static size, for inter-version compatibility */
+#define LZ4_STREAMSIZE       ((1UL << LZ4_MEMORY_USAGE) + 32)  /* static size, for inter-version compatibility */
 #define LZ4_STREAMSIZE_VOIDP (LZ4_STREAMSIZE / sizeof(void*))
 union LZ4_stream_u {
     void* table[LZ4_STREAMSIZE_VOIDP];