ASYLUM: Fix rendering if width != pitch in 8bpp

The reason why the engine needs linearly allocated surface is
Cursor::update() which passes cursor surfaces directly to
CursorMan::replaceCursor().

engines/asylum/system/graphics.cpp

@@ -57,7 +57,7 @@ bool GraphicResource::load(ResourceId id) {
 
 void GraphicResource::clear() {
 	for (uint32 i = 0; i < _frames.size(); i++) {
-		_frames[i].surface.free();
+		delete[] (byte*)_frames[i].surface.getPixels();
 	}
 
 	_frames.clear();
@@ -141,7 +141,7 @@ void GraphicResource::init(byte *data, int32 size) {
 		uint16 width  = READ_LE_UINT16(dataPtr);
 		dataPtr += 2;
 
-		_frames[i].surface.create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+		_frames[i].surface.init(width, height, width, new byte[width * height], Graphics::PixelFormat::createFormatCLUT8());
 
 		memcpy(_frames[i].surface.getPixels(), dataPtr, (size_t)(width * height));
 	}