Fix wrong loop variable for array index in sz_boot_pind2sz_tab

The sentinel fill loop used sz_pind2sz_tab[pind] (constant) instead
of sz_pind2sz_tab[i] (loop variable), writing only to the first
entry repeatedly and leaving subsequent entries uninitialized.

src/sz.c

@@ -65,7 +65,7 @@ sz_boot_pind2sz_tab(const sc_data_t *sc_data) {
 		}
 	}
 	for (int i = pind; i <= (int)SC_NPSIZES; i++) {
-		sz_pind2sz_tab[pind] = sc_data->large_maxclass + PAGE;
+		sz_pind2sz_tab[i] = sc_data->large_maxclass + PAGE;
 	}
 }