adjust to new vsb api

src/tus_blob.c

@@ -68,7 +68,7 @@ tus_chksum_init(VRT_CTX) {
 	char buf[512];
 	int first = 1;
 
-	AN(VSB_new(names, buf, sizeof buf, VSB_FIXEDLEN));
+	AN(VSB_init(names, buf, sizeof buf));
 
 	load_vmod(&import_Vmod_blob_Data, &dl_vmod_blob,
 	    (const void **)&vmod_blob);
@@ -96,6 +96,7 @@ tus_chksum_init(VRT_CTX) {
 #include "tbl_hash_enum.h"
 	AZ(VSB_finish(names));
 	REPLACE(hashes, VSB_data(names));
+	VSB_fini(names);
 	fprintf(stderr, "digests OK\n");
 
 	// dummy ref to appease compiler

src/tus_file.c

@@ -752,7 +752,7 @@ tus_file_new(VRT_CTX, struct VPFX(tus_server) *srv, enum tus_f_type type,
 	}
 
 	/* there is no mkostempat() */
-	AN(VSB_new(vsb_path, buf, sizeof buf, VSB_FIXEDLEN));
+	AN(VSB_init(vsb_path, buf, sizeof buf));
 	VSB_cat(vsb_path, tus_server_basedir(srv));
 	VSB_cat(vsb_path, "/" TUS_FILE_PFX);
 	tus_name_rnd(vsb_path);
@@ -767,6 +767,7 @@ tus_file_new(VRT_CTX, struct VPFX(tus_server) *srv, enum tus_f_type type,
 		return (NULL);
 	}
 	path = VSB_data(vsb_path);
+	VSB_fini(vsb_path);
 
 	if (fallocate(fd, 0, 0, header_size)) {
 		VSLb(ctx->vsl, SLT_Error, "%s: fallocate(%s) failed: %d (%s)",