Fixes to the Windows VFS to allow memory mapped files to work without WAL support.

FossilOrigin-Name: 272fddc14cc322655eeba670bc0f9fc30e5a804c

diff --cc manifest
index 6994d5e8ec9e7ef625e9285dc633ce8f63dc8228,cf7c330a5e6f04de1943ebc87240848d0a53a973..a8453434a24f572706e02f4a64bbdc7240a6fd22
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sharmless\scompiler\swarnings\sin\sthe\snew\sbalance_nonroot()\sroutine.
- D 2014-11-05T21:21:08.046
 -C Skip\stests\sthat\srequire\sWAL\smode\swhen\sit\sis\snot\senabled.
 -D 2014-11-04T19:52:15.610
++C Fixes\sto\sthe\sWindows\sVFS\sto\sallow\smemory\smapped\sfiles\sto\swork\swithout\sWAL\ssupport.
++D 2014-11-05T21:34:56.096
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1211,7 -1211,7 +1211,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 2d36be5d9a1cdd4fd2d54fc4eeece32a81cbacc1
- R e9a3ba77188e96b62213debbd39f0d21
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 -R ab0636a3afda48f38dd438546ea79dde
 -U mistachkin
 -Z 673ee028789258ee8d4aa78195cdb56d
++P 83a1e5db926b3a6d40f4a5cf9a8e6852b9bac9ac 6fc4ead26d19b9348bbda34c3053ae1e066abc32
++R 3ad47b2ac5693ba63ff5c591cf540d89
++T +closed 6fc4ead26d19b9348bbda34c3053ae1e066abc32
 +U drh
- Z dda139af7d076df31a05d3458397d7d6
++Z ee3b32335a4c8630acaf81919b28b64e

diff --cc manifest.uuid
index 82de0553f17434f0846c87bc8a1a23d6435c3c20,b10e2d0d51b71968dded9c4400eed21102bb7d41..b558f0927472029aef1c2d25d801255cc938c259
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 83a1e5db926b3a6d40f4a5cf9a8e6852b9bac9ac
 -6fc4ead26d19b9348bbda34c3053ae1e066abc32
++272fddc14cc322655eeba670bc0f9fc30e5a804c