Ensure that sqlite3_blob_reopen() correctly handles short rows.

Fix for ticket [e6e962d6b0f06f46e].

FossilOrigin-Name: 8cd1a4451cce1fe28f462800e2be1dee1735c0d0

diff --cc manifest
index 01c84dc4e58bfdf2ad63e974f17a3a4f817885d1,2325ce262566f24e1c903a2b740ee49dfaa66840..edea9fbb44cb289db17e011a94ffd436be2e364a
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sSQLITEINT_H\smacro\susage\sin\stwo\sextensions.
- D 2017-01-25T13:54:27.195
 -C Ensure\sthat\ssqlite3_blob_reopen()\scorrectly\shandles\sshort\srows.\nProposed\sfix\sfor\sticket\s[e6e962d6b0f06f46e].\s\sFurther\stesting\sneeded.
 -D 2017-01-25T04:41:34.251
++C Ensure\sthat\ssqlite3_blob_reopen()\scorrectly\shandles\sshort\srows.\s\nFix\sfor\sticket\s[e6e962d6b0f06f46e].
++D 2017-01-25T14:38:19.847
  F Makefile.in 5f415e7867296d678fed2e6779aea10c1318b4bc
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc b8ca53350ae545e3562403d5da2a69cec79308da
@@@ -1547,7 -1547,10 +1547,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
--P 175bda87288c7ce15b163316159f53a60822ccad
- R a9fb164433cc898aa04fd742715e395e
 -R 344bedd0898a54c0d1255ff2528051f8
 -T *branch * blob_reopen-fix
 -T *sym-blob_reopen-fix *
 -T -sym-trunk *
++P 0803390c152141c9ab4e7a28406b2a5d72a5c2fa 57d8dad35c2a9ab635e954dce7f3986ae1ca8ed2
++R d15a5cee6a51c7118a4d78b7d0cbd2de
++T +closed 57d8dad35c2a9ab635e954dce7f3986ae1ca8ed2
  U drh
- Z 35bb9e1641d0b89bf56f9577622d86ef
 -Z ac35e85a79d80d6e1f6100309e724651
++Z f9af43b146da8d8246d0b97014ae0d3a

diff --cc manifest.uuid
index 94c54c55e9491140ec991cfb7cb633ccee639413,1d4e697bcddaddbccb8999dfc4f28696e5735449..d15e64c7de36d8ec4f3eb7811e29e3feee30556a
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 0803390c152141c9ab4e7a28406b2a5d72a5c2fa
 -57d8dad35c2a9ab635e954dce7f3986ae1ca8ed2
++8cd1a4451cce1fe28f462800e2be1dee1735c0d0