Use symbolic names ONEPASS_OFF, ONEPASS_SINGLE, and ONEPASS_MULTI for the
various modes of the one-pass optimization.

FossilOrigin-Name: 16e56bdadef903c6439a487f2683388aeeb0c625
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 7fc3464..747f19b 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3381,6 +3381,9 @@
 int sqlite3WhereContinueLabel(WhereInfo*);
 int sqlite3WhereBreakLabel(WhereInfo*);
 int sqlite3WhereOkOnePass(WhereInfo*, int*);
+#define ONEPASS_OFF      0        /* Use of ONEPASS not allowed */
+#define ONEPASS_SINGLE   1        /* ONEPASS valid for a single row update */
+#define ONEPASS_MULTI    2        /* ONEPASS is valid for multiple rows */
 void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int);
 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8);
 void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);