Fixed VS2015 compile.

src/core/core.vcxproj

@@ -109,6 +109,7 @@
     <ClCompile Include="plugin\PluginFactory.cpp" />
     <ClCompile Include="support\Common.cpp" />
     <ClCompile Include="support\NonLibraryTrackHelper.cpp" />
+    <ClCompile Include="support\PreferenceKeys.cpp" />
     <ClCompile Include="support\Preferences.cpp" />
     <ClCompile Include="support\ThreadHelper.cpp" />
     <ClCompile Include="support\Version.cpp" />
@@ -156,6 +157,7 @@
     <ClInclude Include="audio\Stream.h" />
     <ClInclude Include="support\Common.h" />
     <ClInclude Include="support\NonLibraryTrackHelper.h" />
+    <ClInclude Include="support\PreferenceKeys.h" />
     <ClInclude Include="support\Preferences.h" />
     <ClInclude Include="support\ThreadHelper.h" />
     <ClInclude Include="support\Version.h" />

src/core/core.vcxproj.filters

@@ -112,6 +112,9 @@
     <ClCompile Include="audio\GaplessTransport.cpp">
       <Filter>src\audio</Filter>
     </ClCompile>
+    <ClCompile Include="support\PreferenceKeys.cpp">
+      <Filter>src\support</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="pch.hpp">
@@ -249,5 +252,8 @@
     <ClInclude Include="audio\GaplessTransport.h">
       <Filter>src\audio</Filter>
     </ClInclude>
+    <ClInclude Include="support\PreferenceKeys.h">
+      <Filter>src\support</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

src/core/support/PreferenceKeys.cpp

@@ -32,6 +32,7 @@
 //
 //////////////////////////////////////////////////////////////////////////////
 
+#include "pch.hpp"
 #include "PreferenceKeys.h"
 
 namespace musik { namespace core { namespace prefs {

src/musikbox/app/util/PreferenceKeys.cpp

@@ -32,6 +32,7 @@
 //
 //////////////////////////////////////////////////////////////////////////////
 
+#include "stdafx.h"
 #include "PreferenceKeys.h"
 
 namespace musik { namespace box { namespace prefs {

src/musikbox/musikbox.vcxproj

@@ -134,6 +134,7 @@
     <ClCompile Include="app\util\GlobalHotkeys.cpp" />
     <ClCompile Include="app\util\Hotkeys.cpp" />
     <ClCompile Include="app\util\Playback.cpp" />
+    <ClCompile Include="app\util\PreferenceKeys.cpp" />
     <ClCompile Include="app\util\SystemInfo.cpp" />
     <ClCompile Include="app\window\CategoryListView.cpp" />
     <ClCompile Include="app\window\EntryWithHeader.cpp" />
@@ -190,6 +191,7 @@
     <ClInclude Include="app\util\GlobalHotkeys.h" />
     <ClInclude Include="app\util\Hotkeys.h" />
     <ClInclude Include="app\util\Playback.h" />
+    <ClInclude Include="app\util\PreferenceKeys.h" />
     <ClInclude Include="app\util\SystemInfo.h" />
     <ClInclude Include="app\window\CategoryListView.h" />
     <ClInclude Include="app\window\EntryWithHeader.h" />

src/musikbox/musikbox.vcxproj.filters

@@ -144,6 +144,9 @@
     <ClCompile Include="app\layout\SettingsLayout.cpp">
       <Filter>app\layout</Filter>
     </ClCompile>
+    <ClCompile Include="app\util\PreferenceKeys.cpp">
+      <Filter>app\util</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="stdafx.h" />
@@ -333,6 +336,9 @@
     <ClInclude Include="app\layout\ITopLevelLayout.h">
       <Filter>app\layout</Filter>
     </ClInclude>
+    <ClInclude Include="app\util\PreferenceKeys.h">
+      <Filter>app\util</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="cursespp">