Increase the iVersion for sqlite3_module needed for the xSavepoint,

xRelease, and xRollbackTo methods from 1 to 2.  This is so that it will
conform to published documentation.

FossilOrigin-Name: 0f4954e9793332573d4ffa0c1e199180f4cb990a

src/sqlite.h.in

@@ -4611,8 +4611,8 @@ struct sqlite3_module {
                        void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
                        void **ppArg);
   int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
-  /* The methods above are in version 0 of the sqlite_module object. Those 
-  ** below are for version 1 and greater. */
+  /* The methods above are in version 1 of the sqlite_module object. Those 
+  ** below are for version 2 and greater. */
   int (*xSavepoint)(sqlite3_vtab *pVTab, int);
   int (*xRelease)(sqlite3_vtab *pVTab, int);
   int (*xRollbackTo)(sqlite3_vtab *pVTab, int);

src/vtab.c

@@ -874,7 +874,7 @@ int sqlite3VtabSavepoint(sqlite3 *db, int op, int iSavepoint){
     int i;
     for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){
       const sqlite3_module *pMod = db->aVTrans[i]->pMod->pModule;
-      if( pMod->iVersion>=1 ){
+      if( pMod->iVersion>=2 ){
         int (*xMethod)(sqlite3_vtab *, int);
         switch( op ){
           case SAVEPOINT_BEGIN: