Fix memory leak in sound.cpp

Also link ASAN for devilutionx

CMakeLists.txt

@@ -247,12 +247,12 @@ foreach(target devilution devilutionx)
       SDL2::SDL2_ttf
       SDL2::SDL2_mixer)
   endif()
-endforeach(target devilution devilutionx)
 
-if(ASAN)
-  target_compile_options(devilution PUBLIC -fsanitize=address -fsanitize-recover=address)
-  target_link_libraries(devilution PUBLIC -fsanitize=address -fsanitize-recover=address)
-endif()
+  if(ASAN)
+    target_compile_options(${target} PUBLIC -fsanitize=address -fsanitize-recover=address)
+    target_link_libraries(${target} PUBLIC -fsanitize=address -fsanitize-recover=address)
+  endif()
+endforeach(target devilution devilutionx)
 
 if(DIST AND NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
   target_link_libraries(devilutionx PUBLIC -static-libgcc -static-libstdc++)

SourceX/miniwin/dsound.h

@@ -4,13 +4,13 @@
 
 namespace dvl {
 
-struct DirectSoundBuffer : public IDirectSoundBuffer {
+struct DirectSoundBuffer final : public IDirectSoundBuffer {
 public:
-        virtual void Release();
-        void GetStatus(LPDWORD pdwStatus);
-        void Play(int lVolume, int lPan);
-        void Stop();
-        const char *SetChunk(BYTE *fileData, DWORD dwBytes);
+        void Release() override;
+        void GetStatus(LPDWORD pdwStatus) override;
+        void Play(int lVolume, int lPan) override;
+        void Stop() override;
+        const char *SetChunk(BYTE *fileData, DWORD dwBytes) override;
     private:
         Mix_Chunk *chunk;
 };

SourceX/sound.cpp

@@ -114,6 +114,7 @@ void sound_file_cleanup(TSnd *sound_file)
 		if (sound_file->DSB) {
 			sound_file->DSB->Stop();
 			sound_file->DSB->Release();
+			delete static_cast<DirectSoundBuffer *>(sound_file->DSB);
 			sound_file->DSB = NULL;
 		}