Internally, use a 64-bit integers for segment level numbers.

FossilOrigin-Name: 8180e320ee4090e41511836678e49a98c0b228e8

diff --cc manifest
index 48cfe8e5aa14b6b92ee3686947c6005cb14acf44,0cdba0d21be56ba457e5c2694571d47db81141b6..6c0b7335d0238bef3e8fc8aeac338785f5ff1fce
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sa\sbroken\stest\scase\sin\sfts4growth2.test.
- D 2014-05-17T15:10:37.982
 -C Fix\sharmless\scompiler\swarnings.
 -D 2014-05-16T23:38:59.727
++C Internally,\suse\sa\s64-bit\sintegers\sfor\ssegment\slevel\snumbers.
++D 2014-05-17T16:56:52.166
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in dd2b1aba364ff9b05de41086f74407f285c57670
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1172,7 -1172,10 +1172,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
--P 9623a29c11e3a90513016ea3306c085d2bf91b62
- R 7fbf0d1c98f8f088bba70604a90180b5
 -R 5ded43b85153ff3080cc0993c5b9bd75
 -T *branch * ftsWarnings
 -T *sym-ftsWarnings *
 -T -sym-trunk *
 -U mistachkin
 -Z 3f5cc6ff89fc3bbade4957ecc9f7a199
++P 9fde5b960af39b187474e5b2909ff0e56d5e0bf9 7e60347e21a7473974061965a8d1f2eadde987e2
++R 760c47be4e4c59e75f81e88f9a3c89bc
 +U dan
- Z 9d3390acf23fdcf50586fd0f9fba7a93
++Z a762a27782746cb8cee894bb7c1f28d3

diff --cc manifest.uuid
index 99244e27d5408a6239a8df9d1de305f34c407642,7ca9a7ea7baae686e5cf6596b30583a68df24e3a..6307ea55eb5e995eacb67e5c0e4a30a0dec971b2
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 9fde5b960af39b187474e5b2909ff0e56d5e0bf9
 -7e60347e21a7473974061965a8d1f2eadde987e2
++8180e320ee4090e41511836678e49a98c0b228e8