tweaks to 16bit shaders
fix typo-bug in 4444 blend case



git-svn-id: http://skia.googlecode.com/svn/trunk@265 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkCoreBlitters.h b/src/core/SkCoreBlitters.h
index 7da7cad..5e34685 100644
--- a/src/core/SkCoreBlitters.h
+++ b/src/core/SkCoreBlitters.h
@@ -128,7 +128,7 @@
         : INHERITED(device, paint) {}
     virtual void blitMask(const SkMask&, const SkIRect&);
     virtual void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]);
-    
+
 private:
     typedef SkARGB32_Opaque_Blitter INHERITED;
 };