Force scons to include soci version file:

Running `scons vcxproj` will sometimes include
soci's version.h and sometimes it will not. This
patch forces it to always include the file.

Builds/VisualStudio2013/RippleD.vcxproj

@@ -4502,6 +4502,8 @@
     </ClCompile>
     <ClInclude Include="..\..\src\soci\src\core\values.h">
     </ClInclude>
+    <ClInclude Include="..\..\src\soci\src\core\version.h">
+    </ClInclude>
     <ClInclude Include="..\..\src\sqlite\sqlite.h">
     </ClInclude>
     <ClCompile Include="..\..\src\sqlite\sqlite.unity.c">

Builds/VisualStudio2013/RippleD.vcxproj.filters

@@ -5274,6 +5274,9 @@
     <ClInclude Include="..\..\src\soci\src\core\values.h">
       <Filter>soci\src\core</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\soci\src\core\version.h">
+      <Filter>soci\src\core</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\sqlite\sqlite.h">
       <Filter>sqlite</Filter>
     </ClInclude>

src/ripple/app/data/SociDB.h

@@ -131,4 +131,9 @@ std::unique_ptr <Checkpointer> makeCheckpointer (soci::session&, JobQueue&);
 
 } // ripple
 
+// Do not remove this dead code. It forces `scons vcxproj` to include version.h.
+#if 0
+#include "version.h"
+#endif
+
 #endif