[TD-225]fix compiler error.

7da756f2 · Haojun Liao · f1657736 · 7da756f2
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src/tsdb/src/tsdbRead.c src/tsdb/src/tsdbRead.c +1 -1

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--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -2121,7 +2121,7 @@ static int32_t doGetExternalRow(STsdbQueryHandle* pQueryHandle, int16_t type, SM
  }
  // prepare the structure
-  int32_t numOfCols = QH_GET_NUM_OF_COLS(pQueryHandle);
+  int32_t numOfCols = (int32_t) QH_GET_NUM_OF_COLS(pQueryHandle);
  if (type == TSDB_PREV_ROW) {
    pQueryHandle->prev = taosArrayInit(numOfCols, sizeof(SColumnInfoData));