DSU: Fix bad crc calculate (#410)

dist/linux/info.cemu.Cemu.desktop

@@ -3,7 +3,7 @@ Name=Cemu
 Type=Application
 Terminal=false
 Icon=info.cemu.Cemu
-Exec=cemu
+Exec=Cemu
 GenericName=Wii U Emulator
 GenericName[fi]=Wii U -emulaattori
 GenericName[el]=Πρόγραμμα προσομοίωσης Wii U

src/input/api/DSU/DSUControllerProvider.cpp

@@ -263,7 +263,7 @@ void DSUControllerProvider::reader_thread()
 		if (ec)
 		{
 #ifdef DEBUG_DSU_CLIENT
-				printf(" DSUControllerProvider::ReaderThread: exception %s\n", ex.what());
+				printf(" DSUControllerProvider::ReaderThread: exception %s\n", ec.what());
 #endif
 
 			// there's probably no server listening on the given address:port
@@ -406,10 +406,10 @@ void DSUControllerProvider::writer_thread()
 		{
 			m_socket.send_to(boost::asio::buffer(msg.get(), msg->GetSize()), m_receiver_endpoint);
 		}
-		catch (const std::exception&)
+		catch (const std::exception& ec)
 		{
 #ifdef DEBUG_DSU_CLIENT
-			printf(" DSUControllerProvider::WriterThread: exception %s\n", ex.what());
+			printf(" DSUControllerProvider::WriterThread: exception %s\n", ec.what());
 #endif
 			std::this_thread::sleep_for(std::chrono::milliseconds(250));
 		}

src/input/api/DSU/DSUMessages.cpp

@@ -16,7 +16,14 @@ void MessageHeader::Finalize(size_t size)
 
 uint32_t MessageHeader::CRC32(size_t size) const
 {
-	return crc32_calc(this, size);
+	uint32_t tmp, tmp2;
+
+	tmp = m_crc32;
+	m_crc32 = 0;
+	tmp2 = crc32_calc(this, size);
+	m_crc32 = tmp;
+
+	return tmp2;
 }
 
 bool MessageHeader::IsClientMessage() const { return m_magic == kMagicClient; }