Fix a long-standing issue with the distinct-as-aggregate optimization that

only expressed when the new collating-sequence logic is turned on.

FossilOrigin-Name: 0aaf52a339808386984c30cca0c0c35ac2e70e7e

src/sqliteInt.h

@@ -2330,6 +2330,7 @@ struct AuthContext {
 #define OPFLAG_TYPEOFARG     0x80    /* OP_Column only used for typeof() */
 #define OPFLAG_BULKCSR       0x01    /* OP_Open** used to open bulk cursor */
 #define OPFLAG_P2ISREG       0x02    /* P2 to OP_Open** is a register number */
+#define OPFLAG_PERMUTE       0x01    /* OP_Compare: use the permutation */
 
 /*
  * Each trigger present in the database schema is stored as an instance of