Fix return status

src/vmod_zipflow.c

@@ -613,7 +613,7 @@ vdp_zipflow_init(VRT_CTX, struct vdp_ctx *vdc, void **priv, struct objcore *oc)
 
 	if (zft->req) {
 		VSLb(vdc->vsl, SLT_Error, "zipflow: can't be nested");
-		return (1);
+		return (-1);
 	}
 
 	if (vdc->req->resp_len == 0) {
@@ -627,7 +627,7 @@ vdp_zipflow_init(VRT_CTX, struct vdp_ctx *vdc, void **priv, struct objcore *oc)
 		if (zft->zis == NULL) {
 			VSLb(vdc->vsl, SLT_Error, "zipflow: workspace "
 			    "overflow for body_resp");
-			return (1);
+			return (-1);
 		}
 		zft->zis->zft = zft;
 		zft->zis->func = zfr_iter_include;
@@ -640,7 +640,7 @@ vdp_zipflow_init(VRT_CTX, struct vdp_ctx *vdc, void **priv, struct objcore *oc)
 	zft->zip = zip_pipe(vdc, vdp_zipflow_put, zfr->level);
 	if (zft->zip == NULL) {
 		VSLb(vdc->vsl, SLT_Error, "zipflow: zip_pipe failed");
-		return (1);
+		return (-1);
 	}
 	AZ(zip_log(zft->zip, vdc->vsl, vdp_zipflow_log));