Fix warnings.

stepmania/src/Course.cpp

@@ -977,7 +977,7 @@ bool Course::GetTrailUnsorted( StepsType st, CourseDifficulty cd, Trail &trail )
 			break;
 		}
 
-		if( e->iChooseIndex < vpPossibleSongs.size() )
+		if( e->iChooseIndex < int(vpPossibleSongs.size()) )
 		{
 			pResolvedSong = vpPossibleSongs[e->iChooseIndex];
 			vector<Steps*> &vpPossibleSteps = mapSongToSteps[pResolvedSong];

stepmania/src/Profile.cpp

@@ -1049,7 +1049,7 @@ Profile::LoadResult Profile::LoadEditableDataFromDir( CString sDir )
 
 	// This is data that the user can change, so we have to validate it.
 	wstring wstr = CStringToWstring(m_sDisplayName);
-	if( (int) wstr.size() > MAX_DISPLAY_NAME_LENGTH )
+	if( wstr.size() > MAX_DISPLAY_NAME_LENGTH )
 		wstr = wstr.substr(0, MAX_DISPLAY_NAME_LENGTH);
 	m_sDisplayName = WStringToCString(wstr);
 	// TODO: strip invalid chars?

stepmania/src/ScreenOptionsMasterPrefs.cpp

@@ -372,7 +372,7 @@ static void LifeDifficulty( int &sel, bool ToSel, const ConfOption *pConfOption
 
 static int GetLifeDifficulty()
 {
-	int iLifeDifficulty;
+	int iLifeDifficulty = 0;
 	LifeDifficulty( iLifeDifficulty, true, NULL );	
 	iLifeDifficulty++;	// LifeDifficulty returns an index
 	return iLifeDifficulty;