Fix a problem in the sessions module with logging sqlite_stat1 rows for which

(idx IS NULL) is true.

FossilOrigin-Name: 25bf734be1b3883fccf12ac4d93d50289aa307fb60a52e0e32df12f7ee4edc7a

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sproblem\scausing\sthe\ssessions\smodule\sto\soccasionally\slose\strack\sof\srows\nwith\scomposite\sprimary\skeys\swhen\sthere\sare\stwo\srows\swith\sthe\ssame\stext\svalue\nin\sthe\sleftmost\scolumn\sof\sthe\sPK.
-D 2018-01-17T17:38:18.448
+C Fix\sa\sproblem\sin\sthe\ssessions\smodule\swith\slogging\ssqlite_stat1\srows\sfor\swhich\n(idx\sIS\sNULL)\sis\strue.
+D 2018-01-17T20:57:20.602
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 38f84f301cbef443b2d269f67a74b8cc536469831f70df7c3e912acc04932cc2
@@ -398,9 +398,9 @@ F ext/session/sessionat.test efe88965e74ff1bc2af9c310b28358c02d420c1fb2705cc7a28
 F ext/session/sessiondiff.test ad13dd65664bae26744e1f18eb3cbd5588349b7e9118851d8f9364248d67bcec
 F ext/session/sessionfault.test da273f2712b6411e85e71465a1733b8501dbf6f7
 F ext/session/sessionfault2.test 04aa0bc9aa70ea43d8de82c4f648db4de1e990b0
-F ext/session/sessionstat1.test e3a3f5876ce1526b48f6f447ee0b18960ac683e3fc891791e1ca0c08e823d498
+F ext/session/sessionstat1.test 16268a9bf62ab19c9bc9e41404bf7a13b5fd37c9cb6cf278a472f0c6c50d7ac1
 F ext/session/sessionwor.test 2f3744236dc8b170a695b7d8ddc8c743c7e79fdc
-F ext/session/sqlite3session.c c9d813ffa8db0670257da0a0c931e7188dfbb0010bf1a38274775c9b6300dd5c
+F ext/session/sqlite3session.c 870d142ec13c0e053139e7f3427aa550e59faf1775ae2bca051766089d9faf7b
 F ext/session/sqlite3session.h cb4d860101ba6d3ac810f18684539b766d24d668fa2436cdde90d711af9464fb
 F ext/session/test_session.c eb0bd6c1ea791c1d66ee4ef94c16500dad936386
 F ext/userauth/sqlite3userauth.h 7f3ea8c4686db8e40b0a0e7a8e0b00fac13aa7a3
@@ -422,7 +422,7 @@ F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
 F sqlite3.1 fc7ad8990fc8409983309bb80de8c811a7506786
 F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
 F src/alter.c cf7a8af45cb0ace672f47a1b29ab24092a9e8cd8d945a9974e3b5d925f548594
-F src/analyze.c f9bfffd0416c547a916cb96793b94684bdb0d26a71542ea31819c6757741c19d
+F src/analyze.c 6b42e36a5dcc2703a771f2411bd5e99524bd62c7ecde209bb88dfb04c72f046e
 F src/attach.c 84c477e856b24c2b9a0983b438a707c0cf4d616cee7a425401d418e58afec24c
 F src/auth.c 6277d63837357549fe14e723490d6dc1a38768d71c795c5eb5c0f8a99f918f73
 F src/backup.c faf17e60b43233c214aae6a8179d24503a61e83b
@@ -1700,7 +1700,10 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P a8aea925f8fde8f2dc5ff4b744d54aa2bf8916f3ee57f22d77fd1ddb5a35a9cc
-R fffe7fea955e558a2fcc7877bcdc39db
+P 09aed13678374bf22087cd808808b711dc703b7c18bc8aaf704850611e17f5cd
+R 99a2e08bb84b46a9c74125d0aa1dbedc
+T *branch * sessions-stat1
+T *sym-sessions-stat1 *
+T -sym-trunk *
 U dan
-Z 8da05c1c6303c10ad33f099cfa382df7
+Z 913b883400e9793131764656e068c1a3