fix iOS build -- pass colortype, not config

include/views/SkWindow.h

Index: include/views/SkWindow.h
diff --git a/include/views/SkWindow.h b/include/views/SkWindow.h
index a35823477648357eb1600485026cc9160cd74d8d..2a9315dc8c77c3b662e0a0af633c5883b38bdc43 100644
--- a/include/views/SkWindow.h
+++ b/include/views/SkWindow.h
@@ -33,7 +33,7 @@ public:
     const SkBitmap& getBitmap() const { return fBitmap; }
 
     void    setColorType(SkColorType);
-    void    resize(int width, int height, SkColorType ct = kUnknown_SkColorType);
+    void    resize(int width, int height, SkColorType = kUnknown_SkColorType);
 
     bool    isDirty() const { return !fDirtyRgn.isEmpty(); }
     bool    update(SkIRect* updateArea);