Add VerifyCookie instructions to "DROP XXX IF EXISTS" statements if the specified database object does not exist when the statement is prepared.

FossilOrigin-Name: a46f32900a013aa6bb2dad2a9ed3ce00ab2493fd
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index d663742..ea0925e 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2768,6 +2768,7 @@
 void sqlite3PrngResetState(void);
 void sqlite3RollbackAll(sqlite3*);
 void sqlite3CodeVerifySchema(Parse*, int);
+void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb);
 void sqlite3BeginTransaction(Parse*, int);
 void sqlite3CommitTransaction(Parse*);
 void sqlite3RollbackTransaction(Parse*);