fix sync memory leak

src/tsdb/src/tsdbMain.c

@@ -249,7 +249,11 @@ uint32_t tsdbGetFileInfo(TSDB_REPO_T *repo, char *name, uint32_t *index, uint32_
   } else {  // get the named file at the specified index. If not there, return 0
     fname = malloc(prefixLen + strlen(name) + 2);
     sprintf(fname, "%s/%s", prefix, name);
-    if (access(fname, F_OK) != 0) return 0;
+    if (access(fname, F_OK) != 0) {
+      taosFree(fname);
+      taosFree(sdup)
+      return 0;
+    }
     if (*index == TSDB_META_FILE_INDEX) {  // get meta file
       tsdbGetStoreInfo(fname, &magic, size);
     } else {