[TD-4394]fix core when select data after modify tag width

src/tsdb/src/tsdbMeta.c

@@ -148,7 +148,9 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
   return 0;
 
 _err:
-  //tsdbFreeTable(super);
+  if (newSuper) {
+    tsdbFreeTable(super);
+  }
   tsdbFreeTable(table);
   return -1;
 }

src/util/src/tskiplist.c

@@ -85,7 +85,7 @@ SSkipList *tSkipListCreate(uint8_t maxLevel, uint8_t keyType, uint16_t keyLen, _
 }
 
 void tSkipListDestroy(SSkipList *pSkipList) {
-  if (pSkipList == NULL || pSkipList->pHead == NULL) return;
+  if (pSkipList == NULL) return;
 
   tSkipListWLock(pSkipList);