[td-255] fix a memory leak.

src/client/src/tscUtil.c

@@ -3241,6 +3241,7 @@ static void freeQueryInfoImpl(SQueryInfo* pQueryInfo) {
 
   taosArrayDestroy(pQueryInfo->pUpstream);
   pQueryInfo->pUpstream = NULL;
+  pQueryInfo->bufLen = 0;
 }
 
 void tscClearSubqueryInfo(SSqlCmd* pCmd) {
@@ -3666,18 +3667,16 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, __async_cb_func_t
   pNewQueryInfo->limit        = pQueryInfo->limit;
   pNewQueryInfo->slimit       = pQueryInfo->slimit;
   pNewQueryInfo->order        = pQueryInfo->order;
-  pNewQueryInfo->vgroupLimit = pQueryInfo->vgroupLimit;
   pNewQueryInfo->tsBuf        = NULL;
   pNewQueryInfo->fillType     = pQueryInfo->fillType;
   pNewQueryInfo->fillVal      = NULL;
-  pNewQueryInfo->numOfFillVal = 0;
   pNewQueryInfo->clauseLimit  = pQueryInfo->clauseLimit;
   pNewQueryInfo->prjOffset    = pQueryInfo->prjOffset;
+  pNewQueryInfo->numOfFillVal = 0;
   pNewQueryInfo->numOfTables  = 0;
   pNewQueryInfo->pTableMetaInfo = NULL;
   pNewQueryInfo->bufLen       = pQueryInfo->bufLen;
-  pNewQueryInfo->buf = malloc(pQueryInfo->bufLen);
-
+  pNewQueryInfo->vgroupLimit  = pQueryInfo->vgroupLimit;
   pNewQueryInfo->distinct     =  pQueryInfo->distinct;
   pNewQueryInfo->multigroupResult = pQueryInfo->multigroupResult;
 

src/util/src/tutil.c

@@ -165,6 +165,8 @@ char *strnchr(char *haystack, char needle, int32_t len, bool skipquote) {
   return NULL;
 }
 
+
+
 char* strtolower(char *dst, const char *src) {
   int esc = 0;
   char quote = 0, *p = dst, c;