add new funcrion wbox_setvalue()
Please add a function that initializes box with the given value:
wbox_init(&wbmd_big, nxb, nyb, nzb, 'r', data_big);
wbox_setvalue_r(&wbmd_big, 0.0);
// and similar for complex and vectorPlease add a function that initializes box with the given value:
wbox_init(&wbmd_big, nxb, nyb, nzb, 'r', data_big);
wbox_setvalue_r(&wbmd_big, 0.0);
// and similar for complex and vector