c++ build error
<p>I am trying to integrate wwise into a test project. I have a project on windows 7 using ms visual studio 2010  and this is the error I get after I try and add a necassary cpp to the project. i dont get this build error on my machine at home with the same set up, what does it mean?</p>

<pre><code>------ Build started: Project: wwise test, Configuration: Debug Win32 ------
  AkFilePackageLUT.cpp
c:\program files (x86)\audiokinetic\wwise v2012.2.1 build 4427\sdk\samples\soundengine\common\akfilepackagelut.h(204): error C2065: 'NULL' : undeclared identifier
      c:\program files (x86)\audiokinetic\wwise v2012.2.1 build 4427\sdk\samples\soundengine\common\akfilepackagelut.cpp(117) : see reference to function template instantiation 'const CAkFilePackageLUT::AkFileEntry&lt;T_FILEID&gt; *CAkFilePackageLUT::LookupFile&lt;AkFileID&gt;(T_FILEID,const CAkFilePackageLUT::FileLUT&lt;T_FILEID&gt; *,bool)' being compiled
      with
      [
          T_FILEID=AkFileID
      ]
c:\program files (x86)\audiokinetic\wwise v2012.2.1 build 4427\sdk\samples\soundengine\common\akfilepackagelut.h(204): error C2065: 'NULL' : undeclared identifier
      c:\program files (x86)\audiokinetic\wwise v2012.2.1 build 4427\sdk\samples\soundengine\common\akfilepackagelut.cpp(140) : see reference to function template instantiation 'const CAkFilePackageLUT::AkFileEntry&lt;T_FILEID&gt; *CAkFilePackageLUT::LookupFile&lt;AkUInt64&gt;(T_FILEID,const CAkFilePackageLUT::FileLUT&lt;T_FILEID&gt; *,bool)' being compiled
      with
      [
          T_FILEID=AkUInt64
      ]
</code></pre>
