update MSVC .sln file
diff --git a/libtommath_VS2008.sln b/libtommath_VS2008.sln
index 1327ccf..c592fe0 100644
--- a/libtommath_VS2008.sln
+++ b/libtommath_VS2008.sln
@@ -6,13 +6,19 @@ EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32
+ Debug|x64 = Debug|x64
Release|Win32 = Release|Win32
+ Release|x64 = Release|x64
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Debug|Win32.ActiveCfg = Debug|Win32
{42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Debug|Win32.Build.0 = Debug|Win32
+ {42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Debug|x64.ActiveCfg = Debug|x64
+ {42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Debug|x64.Build.0 = Debug|x64
{42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Release|Win32.ActiveCfg = Release|Win32
{42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Release|Win32.Build.0 = Release|Win32
+ {42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Release|x64.ActiveCfg = Release|x64
+ {42109FEE-B0B9-4FCD-9E56-2863BF8C55D2}.Release|x64.Build.0 = Release|x64
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE