Now supports EIP-712 filtering with missing chain id & contract address

src_features/signMessageEIP712/context.c

@@ -52,6 +52,10 @@ bool eip712_context_init(void) {
         return false;
     }
 
+    // Since they are optional, they might not be provided by the JSON data
+    explicit_bzero(eip712_context->contract_addr, sizeof(eip712_context->contract_addr));
+    eip712_context->chain_id = 0;
+
     struct_state = NOT_INITIALIZED;
 
     return true;