Update py/gc.c

Co-authored-by: Dan Halbert <[email protected]>

Author: tannewt

py/gc.c

@@ -333,6 +333,7 @@ static bool gc_try_add_heap(size_t failed_alloc) {
     // the additional metadata overheads as calculated in gc_setup_area().
     // CIRCUITPY-CHANGE: calculation of how much to grow the heap
     size_t total_new_blocks = (failed_alloc + BYTES_PER_BLOCK - 1) / BYTES_PER_BLOCK;
+    // CIRCUITPY-CHANGE
     size_t needed = compute_heap_size(total_new_blocks);
 
     size_t avail = gc_get_max_new_split();