add "course fallback" banner so that we can show "edit" for edit courses

stepmania/src/Banner.cpp

@@ -99,7 +99,7 @@ void Banner::LoadFromCourse( Course* pCourse )		// NULL means no course
 {
 	if( pCourse == NULL )						LoadFallback();
 	else if( pCourse->m_sBannerPath != "" )		Load( pCourse->m_sBannerPath );
-	else										LoadFallback();
+	else										LoadCourseFallback();
 
 	m_bScrolling = false;
 }
@@ -140,6 +140,11 @@ void Banner::LoadFallback()
 	Load( THEME->GetPathG("Common","fallback banner") );
 }
 
+void Banner::LoadCourseFallback()
+{
+	Load( THEME->GetPathG("Banner","course fallback") );
+}
+
 void Banner::LoadRoulette()
 {
 	Load( THEME->GetPathG("Banner","roulette") );

stepmania/src/Banner.h

@@ -30,6 +30,7 @@ public:
 	void LoadRoulette();
 	void LoadRandom();
 	void LoadFallback();
+	void LoadCourseFallback();
 
 	void SetScrolling( bool bScroll, float Percent = 0);
 	bool IsScrolling() const { return m_bScrolling; }

stepmania/src/FadingBanner.cpp

@@ -161,7 +161,11 @@ void FadingBanner::LoadFromSong( const Song* pSong )
 
 	/* Don't call HasBanner.  That'll do disk access and cause the music wheel
 	 * to skip. */
-	LoadFromCachedBanner( pSong->GetBannerPath() );
+	CString sPath = pSong->GetBannerPath();
+	if( sPath.empty() )
+		LoadFallback();
+	else
+		LoadFromCachedBanner( sPath );
 }
 
 void FadingBanner::LoadAllMusic()
@@ -192,7 +196,11 @@ void FadingBanner::LoadFromCourse( const Course* pCourse )
 
 	/* Don't call HasBanner.  That'll do disk access and cause the music wheel
 	 * to skip. */
-	LoadFromCachedBanner( pCourse->m_sBannerPath );
+	CString sPath = pCourse->m_sBannerPath;
+	if( sPath.empty() )
+		LoadCourseFallback();
+	else
+		LoadFromCachedBanner( sPath );
 }
 
 void FadingBanner::LoadRoulette()
@@ -213,6 +221,12 @@ void FadingBanner::LoadFallback()
 	m_Banner[m_iIndexLatest].LoadFallback();
 }
 
+void FadingBanner::LoadCourseFallback()
+{
+	BeforeChange();
+	m_Banner[m_iIndexLatest].LoadCourseFallback();
+}
+
 
 // lua start
 #include "LuaBinding.h"

stepmania/src/FadingBanner.h

@@ -26,6 +26,7 @@ public:
 	void LoadRoulette();
 	void LoadRandom();
 	void LoadFallback();
+	void LoadCourseFallback();
 
 	bool LoadFromCachedBanner( const CString &path );