fix null value commit coredump

src/tsdb/src/tsdbRWHelper.c

@@ -677,7 +677,7 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
     nColsNotAllNull++;
   }
 
-  ASSERT(nColsNotAllNull > 0 && nColsNotAllNull <= pDataCols->numOfCols);
+  ASSERT(nColsNotAllNull >= 0 && nColsNotAllNull <= pDataCols->numOfCols);
 
   // Compress the data if neccessary
   int     tcol = 0;