ForestDB tests build issue on Windows

If we ignore indexing related windows build issues (please comment out goforestdb, indexing, query in tlm) then you will encounter some forestdb test compilation issues. If I comment out forestdb tests, then forestdb builds fine on windows.

Can you please check/fix the test compilation problem on Windows. Thanks!

[ 83%] Building CXX object forestdb/CMakeFiles/btree_kv_test.dir/tests/btree_kv_test.cc.obj
btree_kv_test.cc
C:\src\forestdb\tests\btree_kv_test.cc(143) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(143) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(143) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(191) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(191) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(191) : error C2087: 'key' : missing subscript
C:\src\forestdb\tests\btree_kv_test.cc(191) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(294) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(294) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(294) : error C2087: 'key' : missing subscript
C:\src\forestdb\tests\btree_kv_test.cc(294) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(295) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(295) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(295) : error C2133: 'k_out' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(474) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(474) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(474) : error C2087: 'key' : missing subscript
C:\src\forestdb\tests\btree_kv_test.cc(474) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(475) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(475) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(475) : error C2133: 'value' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(614) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(614) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(614) : error C2087: 'key' : missing subscript
C:\src\forestdb\tests\btree_kv_test.cc(614) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(615) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(615) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(615) : error C2133: 'k_out' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(741) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(741) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(741) : error C2133: 'key' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(742) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(742) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(742) : error C2133: 'split' : unknown size
C:\src\forestdb\tests\btree_kv_test.cc(785) : error C2057: expected constant expression
C:\src\forestdb\tests\btree_kv_test.cc(785) : error C2466: cannot allocate an array of constant size 0
C:\src\forestdb\tests\btree_kv_test.cc(785) : error C2133: 'keys' : unknown size
NMAKE : fatal error U1077: 'C:\PROGRA~2\MICROS~1.0\VC\bin\amd64\cl.exe' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\BIN\amd64\nmake.exe"' : return code '0x2'