Another iOS fix for SampleApp.

src/utils/ios/SkImageDecoder_iOS.mm

Index: src/utils/ios/SkImageDecoder_iOS.mm
diff --git a/src/utils/ios/SkImageDecoder_iOS.mm b/src/utils/ios/SkImageDecoder_iOS.mm
index 5e4261ff1db08cd66e90e1d0dff76fda88be70a0..021fa253093590703f72081775cf2ca4731281f3 100755
--- a/src/utils/ios/SkImageDecoder_iOS.mm
+++ b/src/utils/ios/SkImageDecoder_iOS.mm
@@ -29,8 +29,7 @@ bool SkImageDecoder_iOS::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     
     const int width = uimage.size.width;
     const int height = uimage.size.height;
-    SkColorType ct = SkBitmapConfigToColorType(SkBitmap::kARGB_8888_Config);
-    bm->setInfo(SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType), 0);
+    bm->setInfo(SkImageInfo::MakeN32(width, height, kPremul_SkAlphaType), 0);
     if (SkImageDecoder::kDecodeBounds_Mode == mode) {
         return true;
     }