fixed length #define

inc/lc6_crypto.h

 #ifndef LC6_SSL_H
 #define LC6_SSL_H
 
+#include <sodium.h>
 #include "../inc/lc6_common.h"
 
 int lc6crypto_init(void);
 
 void lc6crypto_random(unsigned char*, int);
 
+#define LC6_CRYPTO_HASHLEN crypto_generichash_BYTES
+#define LC6_CRYPTO_HASHSIGNLEN (crypto_secretbox_NONCEBYTES+crypto_box_MACBYTES+crypto_generichash_BYTES)
+
 #endif