change forward decl of SkMatrix from struct (wrong) to class (correct)
fixes issue http://code.google.com/p/skia/issues/detail?id=139



git-svn-id: http://skia.googlecode.com/svn/trunk@755 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/views/SkImageView.h b/include/views/SkImageView.h
index 157abb1..57215c9 100644
--- a/include/views/SkImageView.h
+++ b/include/views/SkImageView.h
@@ -22,7 +22,7 @@
 
 class SkAnimator;
 class SkBitmap;
-struct SkMatrix;
+class SkMatrix;
 
 class SkImageView : public SkView {
 public: