Fix some clang warnings

-Wunqualified-std-cast-call and -Wsign-compare.

src/Difficulty.cpp

@@ -32,7 +32,7 @@ const RString &CourseDifficultyToLocalizedString( CourseDifficulty x )
 		FOREACH_ENUM( Difficulty,i)
 		{
 			std::unique_ptr<LocalizedString> ap( new LocalizedString("CourseDifficulty", DifficultyToString(i)) );
-			g_CourseDifficultyName[i] = move(ap);
+			g_CourseDifficultyName[i] = std::move(ap);
 		}
 	}
 	return g_CourseDifficultyName[x]->GetValue();

src/EnumHelper.cpp

@@ -87,11 +87,11 @@ const RString &EnumToString( int iVal, int iMax, const char **szNameArray, std::
 		for( int i = 0; i < iMax; ++i )
 		{
 			std::unique_ptr<RString> ap( new RString( szNameArray[i] ) );
-			pNameCache[i] = move(ap);
+			pNameCache[i] = std::move(ap);
 		}
 
 		std::unique_ptr<RString> ap( new RString );
-		pNameCache[iMax+1] = move(ap);
+		pNameCache[iMax+1] = std::move(ap);
 	}
 
 	// iMax+1 is "Invalid".  iMax+0 is the NUM_ size value, which can not be converted

src/EnumHelper.h

@@ -97,7 +97,7 @@ const RString &X##ToLocalizedString( X x ) \
 		for( unsigned i = 0; i < NUM_##X; ++i ) \
 		{ \
 			std::unique_ptr<LocalizedString> ap( new LocalizedString(#X, X##ToString((X)i)) ); \
-			g_##X##Name[i] = move(ap); \
+			g_##X##Name[i] = std::move(ap); \
 		} \
 	} \
 	return g_##X##Name[x]->GetValue();  \

src/arch/InputHandler/InputHandler_Linux_Joystick.cpp

@@ -114,7 +114,7 @@ void InputHandler_Linux_Joystick::InputThread()
 		FD_ZERO(&fdset);
 		int max_fd = -1;
 
-		for(int i = 0; i < m_files.size(); ++i)
+		for(size_t i = 0; i < m_files.size(); ++i)
 		{
 			if (m_files[i].fd < 0)
 				continue;
@@ -131,7 +131,7 @@ void InputHandler_Linux_Joystick::InputThread()
 			continue;
 		RageTimer now;
 
-		for(int i = 0; i < m_files.size(); ++i)
+		for(size_t i = 0; i < m_files.size(); ++i)
 		{
 			if( m_files[i].fd == -1 )
 				continue;
@@ -144,7 +144,7 @@ void InputHandler_Linux_Joystick::InputThread()
 
 			if(ret == -1)
 			{
-				LOG->Warn("Error reading from joystick %i: %s; disabled", i, strerror(errno));
+				LOG->Warn("Error reading from joystick %zu: %s; disabled", i, strerror(errno));
 				close(m_files[i].fd);
 				m_files[i].fd = -1;
 				continue;
@@ -152,7 +152,7 @@ void InputHandler_Linux_Joystick::InputThread()
 
 			if(ret != sizeof(event))
 			{
-				LOG->Warn("Unexpected packet (size %i != %i) from joystick %i; disabled", ret, (int)sizeof(event), i);
+				LOG->Warn("Unexpected packet (size %i != %i) from joystick %zu; disabled", ret, (int)sizeof(event), i);
 				close(m_files[i].fd);
 				m_files[i].fd = -1;
 				continue;
@@ -181,7 +181,7 @@ void InputHandler_Linux_Joystick::InputThread()
 			}
 
 			default:
-				LOG->Warn("Unexpected packet (type %i) from joystick %i; disabled", event.type, i);
+				LOG->Warn("Unexpected packet (type %i) from joystick %zu; disabled", event.type, i);
 				close(m_files[i].fd);
 				m_files[i].fd = -1;
 				continue;
@@ -201,7 +201,7 @@ void InputHandler_Linux_Joystick::GetDevicesAndDescriptions( std::vector<InputDe
 	// and is (hopefully) in the same thread as TryDevice... so doublecheck our thread now.
 	if( m_files.empty() && !m_InputThread.IsCreated() ) StartThread();
 
-	for(int i = 0; i < m_files.size(); ++i)
+	for(size_t i = 0; i < m_files.size(); ++i)
 	{
 		if (m_files[i].fd < 0)
 			continue;