* winamp2.xml: hack to support nums_ex.bmp and numbers.bmp

* theme_loader.cpp: correct handling of subdirectories in winamp
  skins

modules/gui/skins2/parser/builder.cpp

@@ -146,6 +146,12 @@ void Builder::addBitmap( const BuilderData::Bitmap &rData )
     GenericBitmap *pBmp =
         new FileBitmap( getIntf(), m_pImageHandler,
                         rData.m_fileName, rData.m_alphaColor );
+    if( !pBmp->getData() )
+    {
+        // Invalid bitmap
+        delete pBmp;
+        return;
+    }
     m_pTheme->m_bitmaps[rData.m_id] = GenericBitmapPtr( pBmp );
 }
 
@@ -175,6 +181,13 @@ void Builder::addBitmapFont( const BuilderData::BitmapFont &rData )
 {
     GenericBitmap *pBmp =
         new FileBitmap( getIntf(), m_pImageHandler, rData.m_file, 0 );
+    if( !pBmp->getData() )
+    {
+        // invalid bitmap
+        delete pBmp;
+        return;
+    }
+
     m_pTheme->m_bitmaps[rData.m_id] = GenericBitmapPtr( pBmp );
 
     GenericFont *pFont = new BitmapFont( getIntf(), *pBmp, rData.m_type );

modules/gui/skins2/src/file_bitmap.cpp

@@ -28,7 +28,7 @@
 
 FileBitmap::FileBitmap( intf_thread_t *pIntf, image_handler_t *pImageHandler,
                         string fileName, uint32_t aColor ):
-    GenericBitmap( pIntf ), m_width( 0 ), m_height( 0 )
+    GenericBitmap( pIntf ), m_width( 0 ), m_height( 0 ), m_pData( NULL )
 {
     video_format_t fmt_in = {0}, fmt_out = {0};
     picture_t *pPic;

modules/gui/skins2/src/generic_bitmap.cpp

@@ -44,6 +44,11 @@ void BitmapImpl::drawBitmap( const GenericBitmap &rSource, int xSrc, int ySrc,
 {
     int srcWidth = rSource.getWidth();
     uint32_t *pSrc = (uint32_t*)rSource.getData() + ySrc * srcWidth + xSrc;
+    if( !pSrc )
+    {
+        return;
+    }
+
     uint32_t *pDest = (uint32_t*)m_pData + yDest * m_width + xDest ;
     for( int y = 0; y < height; y++ )
     {

modules/gui/skins2/src/theme_loader.cpp

@@ -283,8 +283,12 @@ bool ThemeLoader::extract( const string &fileName )
     }
     else
     {
-        // No XML file, assume it is a winamp2 skin
-        path = tempPath;
+        // No XML file, check if it is a winamp2 skin
+        string mainBmp;
+        if( findFile( tempPath, "main.bmp", mainBmp ) )
+        {
+            msg_Dbg( getIntf(), "Try to load a winamp2 skin" );
+            path = getFilePath( mainBmp );
 
             // Look for winamp2.xml in the resource path
             list<string> resPath = pOsFactory->getResourcePath();
@@ -295,6 +299,7 @@ bool ThemeLoader::extract( const string &fileName )
                     break;
             }
         }
+    }
 
     if( !xmlFile.empty() )
     {

share/skins2/winamp2.xml

@@ -22,6 +22,7 @@
        <SubBitmap id="quit_up" x="18" y="0" width="9" height="9" />
        <SubBitmap id="quit_down" x="18" y="9" width="9" height="9" />
     </Bitmap>
+    <BitmapFont id="digits_font" file="numbers.bmp" type="digits"/>
     <BitmapFont id="digits_font" file="nums_ex.bmp" type="digits"/>
     <BitmapFont id="text_font" file="text.bmp" type="text"/>