VDMOS return if NIintegrate fails

src/spicelib/devices/vdmos/vdmosload.c

@@ -558,6 +558,7 @@ bypass:
                 if (selfheat)
                 {
                     error = NIintegrate(ckt, &gcTt, &ceqqth, 0.0, here->VDMOSqth);
+                    if (error) return(error);
                     gcTt = model->VDMOScthj * ckt->CKTag[0];
                     ceqqth = *(ckt->CKTstate0 + here->VDMOScqth) - gcTt * delTemp;
                 }