Add opcodes OP_InitCoroutine and OP_EndCoroutine. Use these to remove the

need for separate boolean registers to record when a co-routine has finished.

FossilOrigin-Name: 5a88b6a7aef3a0d5380e19eee2ee38439cc9b08b

diff --cc manifest
index 18259af7693bfea334137d4244c056a77958ee93,cea46f3009feb1e8d59cc7865ae176ebb2b09e82..07138b4ba8ace808c425e957a201a249fca96c29
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sredundant\sdefinitions\sof\s_LARGE_FILE\sand\s_LARGEFILE_SOURCE.
- D 2014-02-07T19:33:31.352
 -C Change\sthe\sOP_InitCoroutine\sinstruction\sto\sjump\sover\sthe\sco-routine\nimplementation.
 -D 2014-02-07T19:18:10.928
++C Add\sopcodes\sOP_InitCoroutine\sand\sOP_EndCoroutine.\s\sUse\sthese\sto\sremove\sthe\nneed\sfor\sseparate\sboolean\sregisters\sto\srecord\swhen\sa\sco-routine\shas\sfinished.
++D 2014-02-07T22:21:07.782
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1152,7 -1152,7 +1152,8 @@@ F tool/vdbe-compress.tcl 0cf56e9263a152
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
- P ea4d23d1c0df4fde2e532daa081888712f465884
- R fe35814af819067492f7e22674ab8b60
 -P 1ec0e9dd4b26d9f597adc8e062317d4866c5a6a6
 -R dbad771d6a0c64046f81724e16a6d61c
++P 4043d879795bfad55af35e9cb48e0a42eb4087ae a522f364a6b8ca6f69c353b30609a2166f6e94cf
++R fcb91b77c89313a695cdcaff36627dad
++T +closed a522f364a6b8ca6f69c353b30609a2166f6e94cf
  U drh
- Z bbbf5c390e5238e969c1eb355ec42634
 -Z bb5cd7d324cd2ad57b192424d498539f
++Z 935dc7a454a2a09335ff0c234e8fb57e

diff --cc manifest.uuid
index c78d46e5f26294c95cb6f3473749b2fd96b368e1,9e9204f927e681bb9b15885ff21bcd496c739679..81d36a4a865431aa5278aba4c21c84c50990e73a
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 4043d879795bfad55af35e9cb48e0a42eb4087ae
 -a522f364a6b8ca6f69c353b30609a2166f6e94cf
++5a88b6a7aef3a0d5380e19eee2ee38439cc9b08b