only save mappings for user-changable mapping slots (less cluttered keymaps.ini)

stepmania/src/InputMapper.cpp

@@ -526,7 +526,7 @@ void InputMapper::SaveMappingsToDisk()
 			RString sNameString = GameI.toString( pGame );
 			
 			vector<RString> asValues;
-			for( int slot = 0; slot < NUM_GAME_TO_DEVICE_SLOTS; ++slot )
+			for( int slot = 0; slot < NUM_USER_GAME_TO_DEVICE_SLOTS; ++slot )	// don't save data from the last (keyboard automap) slot
 				asValues.push_back( m_GItoDI[i][j][slot].ToString() );
 		
 			while( asValues.size() && asValues.back() == "" )

stepmania/src/InputMapper.h

@@ -10,6 +10,8 @@
 #include "GameConstantsAndTypes.h"
 
 const int NUM_GAME_TO_DEVICE_SLOTS	= 5;	// five device inputs may map to one game input
+const int NUM_SHOWN_GAME_TO_DEVICE_SLOTS = 3;
+const int NUM_USER_GAME_TO_DEVICE_SLOTS = 2;
 
 class InputMapper
 {