Changed order of struct initializer to avoid compiler error

src/common/tusb_fifo.h

@@ -86,8 +86,8 @@ typedef struct
   .depth                = _depth,                           \
   .item_size            = sizeof(_type),                    \
   .overwritable         = _overwritable,                    \
-  .max_pointer_idx      = 2*(_depth)-1,                     \
   .non_used_index_space = UINT16_MAX - (2*(_depth)-1),      \
+  .max_pointer_idx      = 2*(_depth)-1,                     \
 }
 
 #define TU_FIFO_DEF(_name, _depth, _type, _overwritable)                      \