concat hash no realloc

src/hash.c

@@ -58,6 +58,5 @@ void concat_data(pub_data *data, unsigned char *buf) {
 
 // Concat hash2 to hash1 (hash1 is modified)
 void concat_hash(unsigned char *hash1, unsigned char *hash2, size_t size) {
-	hash1 = (unsigned char*) realloc(hash1, size + 16);
 	memcpy(hash1+size, hash2, 16);
 }