Now only compiles full EIP-712 support for capable devices

src_features/signMessageEIP712/mem.h

@@ -1,6 +1,8 @@
 #ifndef MEM_H_
 #define MEM_H_
 
+#ifdef HAVE_EIP712_FULL_SUPPORT
+
 #include <stdlib.h>
 
 void    mem_init(void);
@@ -12,4 +14,6 @@ void    mem_dealloc(size_t size);
 extern size_t mem_max;
 #endif
 
+#endif // HAVE_EIP712_FULL_SUPPORT
+
 #endif // MEM_H_