fix visual studio build

proj/vs2017/Common/Common.vcxproj

@@ -393,6 +393,7 @@
     <ClCompile Include="..\..\..\src\fileio\xml-parser\tinyxmlerror.cpp" />
     <ClCompile Include="..\..\..\src\fileio\xml-parser\tinyxmlparser.cpp" />
     <ClCompile Include="..\..\..\src\gfx\gfxsheets.cpp" />
+    <ClCompile Include="..\..\..\src\gfx\graphics.cpp" />
     <ClCompile Include="..\..\..\src\gfx\render_image.cpp" />
     <ClCompile Include="..\..\..\src\gfx\render_shapes.cpp" />
     <ClCompile Include="..\..\..\src\gfx\render_text.cpp" />
@@ -449,6 +450,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\src\dialogxml\dialogs\btnpanel.hpp" />
+    <ClInclude Include="..\..\..\src\gfx\graphics.hpp" />
     <ClInclude Include="..\..\..\src\scenario\town_import.tpp" />
     <ClInclude Include="..\..\..\src\alchemy.hpp" />
     <ClInclude Include="..\..\..\src\damage.hpp" />

proj/vs2017/Common/Common.vcxproj.filters

@@ -829,6 +829,9 @@
     <ClCompile Include="..\..\..\src\dialogxml\dialogs\btnpanel.cpp">
       <Filter>DialogXML\Dialogs</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\src\gfx\graphics.cpp">
+      <Filter>Gfx</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\src\scenario\town_import.tpp">
@@ -1087,5 +1090,8 @@
     <ClInclude Include="..\..\..\src\dialogxml\dialogs\btnpanel.hpp">
       <Filter>DialogXML\Dialogs</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\src\gfx\graphics.hpp">
+      <Filter>Gfx</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>