title: WiX x64 platform target
body: <p>When I create a <a href="http://en.wikipedia.org/wiki/WiX" rel="noreferrer">WiX</a> project and try to build it with the platform set to 'x64', I get errors in my build output like this:</p>
  
  <pre><code>------ Build started: Project: MyProject, Configuration: Release x64 ------
  C:\Program Files (x86)\MSBuild\Microsoft\WiX\v3.x\wix2010.targets(444,7): error : The OutputPath property is not set for this project.  Please check to make sure that you have specified a valid Configuration/Platform combination.  Configuration='Release'  Platform='x64'
  Done building project "MyProject.wixproj" -- FAILED.
  ------ Build started: Project: MyProject, Configuration: Debug x64 ------
  C:\Program Files (x86)\MSBuild\Microsoft\WiX\v3.x\wix2010.targets(444,7): error : The OutputPath property is not set for this project.  Please check to make sure that you have specified a valid Configuration/Platform combination.  Configuration='Debug'  Platform='x64'
  Done building project "MyProject.wixproj" -- FAILED.
  </code></pre>
  
  <p>It claims that there's no output path set for the project, but of course, there is. The output path is set to <code>bin\x64\Debug\</code> for the debug configuration and <code>bin\x64\Release\</code> for the release configuration. So what's the error?</p>
  
  <p>Also, the error doesn't show up in the Errors window. Now, I know it's a rookie mistake to blame the compiler, but I'm beginning to wonder... Is this a build tool bug, or am I missing something stupid?</p>