Allow to forward declare of public structs #1215
Thanks to forward declare we can declare `struct` in our header file instead making #include
diff --git a/include/mbedtls/arc4.h b/include/mbedtls/arc4.h
index f11fc5b..83a7461 100644
--- a/include/mbedtls/arc4.h
+++ b/include/mbedtls/arc4.h
@@ -53,7 +53,7 @@
* security risk. We recommend considering stronger ciphers instead.
*
*/
-typedef struct
+typedef struct mbedtls_arc4_context
{
int x; /*!< permutation index */
int y; /*!< permutation index */