runtime: map_cell_index_static produced wrong results when the number of elements per cell was a power of 2

[flga]

package main

import "base:runtime"
import "core:fmt"

main :: proc() {
	m := map[int][3]int{
		1 = {10, 20, 30},
		2 = {40, 50, 60},
		3 = {70, 80, 90},
	}

	fmt.println(runtime.map_get(m, 1))
	fmt.println(runtime.map_get(m, 2))
	fmt.println(runtime.map_get(m, 3))
}

prints

0 [0, 0, 0] false
0 [0, 0, 0] false
0 [0, 0, 0] false

instead of

1 [10, 20, 30] true
2 [40, 50, 60] true
3 [70, 80, 90] true