Q: Given the following code slice:
```
1 static int jpc_dec_process_sod(jpc_dec_t *dec, jpc_ms_t *ms)
3 	jpc_dec_tile_t *tile;
8 	if (!(tile = dec->curtile)) {
12 	if (!tile->partno) {
13 		if (!jpc_dec_cp_isvalid(tile->cp)) {
16 		if (jpc_dec_cp_prepare(tile->cp)) {
19 		if (jpc_dec_tileinit(dec, tile)) {
25 	if (dec->pkthdrstreams) {
28 		if (!(tile->pkthdrstream = jpc_streamlist_remove(dec->pkthdrstreams, 0))) {```
which has a CWE-457 vulnerability at line:
```
28 		if (!(tile->pkthdrstream = jpc_streamlist_remove(dec->pkthdrstreams, 0))) {
```
Please analyze the root cause of the vulnerability.