Security review (#331)

* Fix some issues

* add typed_data.c changes

* Make attribution after the check

src_features/signMessageEIP712/context.h

@@ -16,6 +16,9 @@ extern s_eip712_context *eip712_context;
 bool eip712_context_init(void);
 void eip712_context_deinit(void);
 
+typedef enum {NOT_INITIALIZED, INITIALIZED} e_struct_init;
+extern e_struct_init struct_state;
+
 #endif  // HAVE_EIP712_FULL_SUPPORT
 
 #endif  // EIP712_CTX_H_