Avoid unnecessary WHERE clause term tests when coding a join where one of the tables...

FossilOrigin-Name: 512caa1ad30e6f699e2d006d5ab7674d55d2c746

diff --cc manifest
index 04ba39cdd89bc0f6f490c3d1351b26623963b89e,4caab7f68f1b38c1ea39ff23c46fc5454491328c..abb80cb617bbcb693dc9bb76d601583b94cfeb5b
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Avoid\stwo\smore\sinstances\sof\spointer\sarithmetic\son\sfreed\spointers.
- D 2016-01-29T08:38:35.193
 -C Avoid\sunnecessary\sWHERE\sclause\sterm\stests\swhen\scoding\sa\sjoin\swhere\sone\nof\sthe\stables\scontains\sa\sOR\sconstraint.
 -D 2016-01-29T16:57:06.008
++C Avoid\sunnecessary\sWHERE\sclause\sterm\stests\swhen\scoding\sa\sjoin\swhere\sone\sof\sthe\stables\scontains\sa\sOR\sconstraint.
++D 2016-01-29T18:11:04.923
  F Makefile.in 027c1603f255390c43a426671055a31c0a65fdb4
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 72b7858f02017611c3ac1ddc965251017fed0845
@@@ -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
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- R 3b0a4b2b0654f088a973292429d2f71d
- U dan
- Z daf578eb367bf673fc68218c1dc6fe42
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+ R a5e195d58a480f7623421e36c529b8b4
++T +closed ab94603974a0ad5342e5aee27603162652e70492
+ U drh
 -Z 416f01dc8ffa44ad767f5afe8de92edc
++Z e540fd89ce55e7aa63a8bd5d9b52b2c8

diff --cc manifest.uuid
index 32fa4e26075076143f0549552950a6e17e636321,87b521ed65463ec6de24cc4352e2caf05a1f32ab..ebf0893a7586d6e5bc7bff7c918710fc278301b6
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 2910ef64097b890c9f8929bf609ea2827db7ac97
 -ab94603974a0ad5342e5aee27603162652e70492
++512caa1ad30e6f699e2d006d5ab7674d55d2c746