Added various GameButton_Invalid checks to InputMapper to make its functions give rational results instead of crashing.

src/InputMapper.cpp

@@ -898,6 +898,10 @@ void InputMapper::MenuToGame( GameButton MenuI, PlayerNumber pn, vector<GameInpu
 
 bool InputMapper::IsBeingPressed( const GameInput &GameI, MultiPlayer mp, const DeviceInputList *pButtonState ) const
 {
+	if(GameI.button == GameButton_Invalid)
+	{
+		return false;
+	}
 	for( int i=0; i<NUM_GAME_TO_DEVICE_SLOTS; i++ )
 	{
 		DeviceInput DeviceI;
@@ -916,6 +920,10 @@ bool InputMapper::IsBeingPressed( const GameInput &GameI, MultiPlayer mp, const
 
 bool InputMapper::IsBeingPressed( GameButton MenuI, PlayerNumber pn ) const
 {
+	if(MenuI == GameButton_Invalid)
+	{
+		return false;
+	}
 	vector<GameInput> GameI;
 	MenuToGame( MenuI, pn, GameI );
 	for( size_t i=0; i<GameI.size(); i++ )
@@ -937,6 +945,10 @@ bool InputMapper::IsBeingPressed(const vector<GameInput>& GameI, MultiPlayer mp,
 
 void InputMapper::RepeatStopKey( const GameInput &GameI )
 {
+	if(GameI.button == GameButton_Invalid)
+	{
+		return;
+	}
 	for( int i=0; i<NUM_GAME_TO_DEVICE_SLOTS; i++ )
 	{
 		DeviceInput DeviceI;
@@ -948,6 +960,10 @@ void InputMapper::RepeatStopKey( const GameInput &GameI )
 
 void InputMapper::RepeatStopKey( GameButton MenuI, PlayerNumber pn )
 {
+	if(MenuI == GameButton_Invalid)
+	{
+		return;
+	}
 	vector<GameInput> GameI;
 	MenuToGame( MenuI, pn, GameI );
 	for( size_t i=0; i<GameI.size(); i++ )
@@ -956,6 +972,10 @@ void InputMapper::RepeatStopKey( GameButton MenuI, PlayerNumber pn )
 
 float InputMapper::GetSecsHeld( const GameInput &GameI, MultiPlayer mp ) const
 {
+	if(GameI.button == GameButton_Invalid)
+	{
+		return 0.f;
+	}
 	float fMaxSecsHeld = 0;
 
 	for( int i=0; i<NUM_GAME_TO_DEVICE_SLOTS; i++ )
@@ -974,6 +994,10 @@ float InputMapper::GetSecsHeld( const GameInput &GameI, MultiPlayer mp ) const
 
 float InputMapper::GetSecsHeld( GameButton MenuI, PlayerNumber pn ) const
 {
+	if(MenuI == GameButton_Invalid)
+	{
+		return 0.f;
+	}
 	float fMaxSecsHeld = 0;
 
 	vector<GameInput> GameI;
@@ -986,6 +1010,10 @@ float InputMapper::GetSecsHeld( GameButton MenuI, PlayerNumber pn ) const
 
 void InputMapper::ResetKeyRepeat( const GameInput &GameI )
 {
+	if(GameI.button == GameButton_Invalid)
+	{
+		return;
+	}
 	for( int i=0; i<NUM_GAME_TO_DEVICE_SLOTS; i++ )
 	{
 		DeviceInput DeviceI;
@@ -996,6 +1024,10 @@ void InputMapper::ResetKeyRepeat( const GameInput &GameI )
 
 void InputMapper::ResetKeyRepeat( GameButton MenuI, PlayerNumber pn )
 {
+	if(MenuI == GameButton_Invalid)
+	{
+		return;
+	}
 	vector<GameInput> GameI;
 	MenuToGame( MenuI, pn, GameI );
 	for( size_t i=0; i<GameI.size(); i++ )
@@ -1004,6 +1036,10 @@ void InputMapper::ResetKeyRepeat( GameButton MenuI, PlayerNumber pn )
 
 float InputMapper::GetLevel( const GameInput &GameI ) const
 {
+	if(GameI.button == GameButton_Invalid)
+	{
+		return 0.f;
+	}
 	float fLevel = 0;
 	for( int i=0; i<NUM_GAME_TO_DEVICE_SLOTS; i++ )
 	{
@@ -1017,6 +1053,10 @@ float InputMapper::GetLevel( const GameInput &GameI ) const
 
 float InputMapper::GetLevel( GameButton MenuI, PlayerNumber pn ) const
 {
+	if(MenuI == GameButton_Invalid)
+	{
+		return 0.f;
+	}
 	vector<GameInput> GameI;
 	MenuToGame( MenuI, pn, GameI );