winws build fix

nfq/nfqws.c

@@ -2551,7 +2551,7 @@ int main(int argc, char **argv)
 				windivert_filter[sizeof(windivert_filter) - 1] = '\0';
 			}
 			break;
-		case IFX_WF_SAVE:
+		case IDX_WF_SAVE:
 			strncpy(wf_save_file, optarg, sizeof(wf_save_file));
 			wf_save_file[sizeof(wf_save_file) - 1] = '\0';
 			break;