Avoid an unnecessary seek operation some corner-case skip-scan operations.

FossilOrigin-Name: 2a6003a937a210dfc279e393d3a0b49d1f3ac92e

diff --cc manifest
index ee2216461326346a7fe0f461fc237414840ca6eb,5cf124d3e6260317936866015b5cc8927509134d..3903e0ee292af6f6193d3a0bd52e699f0e37340a
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Always\suse\sthe\ssqlite3VdbeDeleteAuxdata()\sroutine\sfor\sclearing\sauxdata\son\nfunction\sparameter,\srather\sthan\shaving\sa\sseparate\sdeleteAuxdataFromFrame()\nfor\sdoing\sthe\sjob\sfor\strigger\sframes.
- D 2016-02-22T16:04:31.519
 -C Clearer\spresentation\sof\sthe\slogic.\s\sNo\sfunctional\schanges.
 -D 2016-02-22T21:19:54.531
++C Avoid\san\sunnecessary\sseek\soperation\ssome\scorner-case\sskip-scan\soperations.
++D 2016-02-22T23:14:11.422
  F Makefile.in 4e90dc1521879022aa9479268a4cd141d1771142
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 28fc4ee02333996d31b3602b39eeb8e609a89ce4
@@@ -1429,7 -1429,7 +1429,8 @@@ F tool/vdbe_profile.tcl 246d0da094856d7
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh a98af506df552f3b3c0d904f94e4cdc4e1a6d598
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 3ed1890612bd45bd9c72f670d2cbb0b8fbd35d92
- R 087e6cf717ab51d03c5c0e76eb47f593
 -P 38e837e605076124b73235e1fd832838d9545cb2
++P 64386fa339adb91439da979d74062f67a6ec68fd a3dcf6db76cc09bdfedb1bbeba3b359b77762cbe
+ R 56c5c81425d101f0314396c9251634e4
++T +closed a3dcf6db76cc09bdfedb1bbeba3b359b77762cbe
  U drh
- Z ce8b779f1a9ea7c56d4a99bdf5d3c13f
 -Z dfca62313f421fb124d083409ac98469
++Z 8dd31c368b55043259ced425c01733ad

diff --cc manifest.uuid
index e6907d43a9390ed2c6b02d0c036d9473fdf69b9d,e56034d01bca22021189c55949729baf11a3073d..9ed2a9c8294271905467d3d63f4641b57d3e0721
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 64386fa339adb91439da979d74062f67a6ec68fd
 -a3dcf6db76cc09bdfedb1bbeba3b359b77762cbe
++2a6003a937a210dfc279e393d3a0b49d1f3ac92e