Fix array size with old libsodium

src/encrypt.c

@@ -226,11 +226,17 @@ static const CCMode supported_modes_applecc[CIPHER_NUM] = {
 #endif
 
 static const int supported_ciphers_iv_size[CIPHER_NUM] = {
-    0, 0, 16, 16, 16, 16, 16, 16, 16, 8, 16, 16, 16, 8, 8, 8, 8, 16, 8, 8, 12
+    0, 0, 16, 16, 16, 16, 16, 16, 16, 8, 16, 16, 16, 8, 8, 8, 8, 16, 8, 8
+#if SODIUM_LIBRARY_VERSION_MAJOR >= 8
+    , 12
+#endif
 };
 
 static const int supported_ciphers_key_size[CIPHER_NUM] = {
-    0, 16, 16, 16, 24, 32, 16, 24, 32, 16, 16, 24, 32, 16, 8, 16, 16, 16, 32, 32, 32
+    0, 16, 16, 16, 24, 32, 16, 24, 32, 16, 16, 24, 32, 16, 8, 16, 16, 16, 32, 32
+#if SODIUM_LIBRARY_VERSION_MAJOR >= 8
+    , 32
+#endif
 };
 
 static int