ppVfs            130404 ext/sqlite3/libsqlite/sqlite3.c   sqlite3_vfs **ppVfs,            /* OUT: VFS to use */ 
ppVfs            130606 ext/sqlite3/libsqlite/sqlite3.c   *ppVfs = sqlite3_vfs_find(zVfs);
ppVfs            130607 ext/sqlite3/libsqlite/sqlite3.c   if( *ppVfs==0 ){