Fix to the previous checkin: The colUsed parameter should have high-order bit

set if any of the 64-th or greater columns of the virtual table is used.  The
lower 63 bits of colUsed always show the usage of the first 63 columns of the
virtual table.

FossilOrigin-Name: 90ac8457750ace1d76d7bc957af7877e86e6301bb07361e19beaf5c7b3b6085a

src/where.c

@@ -1506,9 +1506,12 @@ static sqlite3_index_info *allocateIndexInfo(
     /* Ensure that all bits associated with PK columns are set. This is to
     ** ensure they are available for cases like RIGHT joins or OR loops. */
     Index *pPk = sqlite3PrimaryKeyIndex((Table*)pTab);
+    assert( pPk!=0 );
     for(i=0; i<pPk->nKeyCol; i++){
       int iCol = pPk->aiColumn[i];
-      pIdxInfo->colUsed |= (iCol>=BMS ? ALLBITS : MASKBIT(iCol));
+      assert( iCol>=0 );
+      if( iCol>=BMS-1 ) iCol = BMS-1;
+      pIdxInfo->colUsed |= MASKBIT(iCol);
     }
   }
   pHidden->pWC = pWC;