Blitter: Also use sprite flags for non-SSE 32bpp sprite encoder

src/blitter/32bpp_optimized.hpp

@@ -19,6 +19,7 @@ class Blitter_32bppOptimized : public Blitter_32bppSimple {
 public:
 	/** Data stored about a (single) sprite. */
 	struct SpriteData {
+		BlitterSpriteFlags flags;
 		uint32 offset[ZOOM_LVL_COUNT][2]; ///< Offsets (from .data) to streams for different zoom levels, and the normal and remap image information.
 		byte data[];                      ///< Data, all zoomlevels.
 	};