Improvements to FORDELETE processing, including bug fixes and adding

assert() statements to help verify correct operation.

FossilOrigin-Name: 46080b0474363ca6594d2e5c249a280e2b4fc67a

diff --cc manifest
index 101db20db83353b7c59e8169724e9eefe132fce2,26f33539667acdb5e88d4cc815361fb2d770940d..37c3e40cf66665bbe64b275c0534f01df9f9a83a
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Merge\sall\srecent\strunk\senhancements.
- D 2016-01-26T23:32:55.750
 -C Remove\sa\sstray\s"exit"\sin\sa\stest\sscript.
 -D 2016-01-29T18:48:08.448
++C Improvements\sto\sFORDELETE\sprocessing,\sincluding\sbug\sfixes\sand\sadding\nassert()\sstatements\sto\shelp\sverify\scorrect\soperation.
++D 2016-01-29T19:04:11.541
  F Makefile.in 027c1603f255390c43a426671055a31c0a65fdb4
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 6fca5455aaecbd14479f33f091aa19df2d3d2969
@@@ -1422,7 -1422,7 +1422,8 @@@ F tool/vdbe_profile.tcl 246d0da094856d7
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P ac2cbadd8000947c097da5b00c00090fe58fdcff a3d7b8ac53f94d29a11362f193fd1967f30583df
- R 7855243eb7d1aae3e5a98345ca05c333
 -P 2a055ed0afd56e8c6b17cfc31e7808debe9ec765
++P 9a71d56dcea953cb965f1fdda9a8b8f158cdeff6 10c88bf9f2c238abbbb54797ee2327ab72713e6f
+ R 4fbaa01893d53f4580e8296002d14aff
++T +closed 10c88bf9f2c238abbbb54797ee2327ab72713e6f
  U drh
- Z 6eda54656ca87ef44dc31ff7472a92ee
 -Z dbc978af0b86d437c82a817aee2df876
++Z 91aa530fa68de069219425c1000f2200

diff --cc manifest.uuid
index 7255a707a76bfb82163df6fdbd88bcb30de391aa,79ac026d5908a7fdfffe44861ae10a0c1ba00e44..8118d1e7058e87dec8b6f9095033ebcb6564057d
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 9a71d56dcea953cb965f1fdda9a8b8f158cdeff6
 -10c88bf9f2c238abbbb54797ee2327ab72713e6f
++46080b0474363ca6594d2e5c249a280e2b4fc67a