fix another header marked as a cpp file

Author: BenLubar

src/game/client/swarm/c_asw_mortar_round.h

@@ -1,6 +1,5 @@
 #pragma once
 
-#include "cbase.h"
 #include "c_asw_grenade_vindicator.h"
 
 class C_ASW_Mortar_Round : public C_ASW_Grenade_Vindicator

src/game/client/swarm_sdk_client.vcxproj

@@ -3190,7 +3190,7 @@ if exist ..\..\devtools\bin\postbuild.cmd ..\..\devtools\bin\postbuild.cmd clien
     <ClInclude Include="swarm\c_asw_meatbug.h" />
     <ClInclude Include="swarm\c_asw_mesh_emitter_entity.h" />
     <ClInclude Include="swarm\c_asw_mine.h" />
-    <ClCompile Include="swarm\c_asw_mortar_round.h" />
+    <ClInclude Include="swarm\c_asw_mortar_round.h" />
     <ClInclude Include="swarm\c_asw_objective.h" />
     <ClInclude Include="swarm\c_asw_objective_countdown.h" />
     <ClInclude Include="swarm\c_asw_objective_kill_aliens.h" />