Continue working to get UPDATE operational for WITHOUT ROWID tables.
Fix PRAGMA integrity_check so that it works on WITHOUT ROWID tables.

FossilOrigin-Name: 0d4fea7462c0f61cd1c736cbcd7bea5ec2034d54
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index ec4aaa1..d730bf9 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -1526,7 +1526,7 @@
   sqlite3 *db;        /* The database connection */
   u8 enc;             /* Text encoding - one of the SQLITE_UTF* values */
   u16 nField;         /* Number of key columns in the index */
-  u16 nXField;         /* Number of columns beyond the key columns */
+  u16 nXField;        /* Number of columns beyond the key columns */
   u8 *aSortOrder;     /* Sort order for each column. */
   CollSeq *aColl[1];  /* Collating sequence for each term of the key */
 };
@@ -2922,6 +2922,7 @@
 void sqlite3GenerateRowDelete(Parse*,Table*,Trigger*,int,int,i16,u8,u8);
 void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
 int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*);
+void sqlite3PrincipleBtree(Table*,int,Index**,int*);
 void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
                                      int*,int,int,int,int,int*);
 void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int, int);