Fix reference in project file

Author: donker

Server/Blog/DotNetNuke.Modules.Blog.vbproj

@@ -500,6 +500,12 @@
       <SubType>Designer</SubType>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Core\DotNetNuke.Modules.Blog.Core.csproj">
+      <Project>{18cbd81c-c31c-465d-8865-70957df4711c}</Project>
+      <Name>DotNetNuke.Modules.Blog.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
   <PropertyGroup>
     <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
     <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>