add optional Format* parameter to decoder helper functions.



git-svn-id: http://skia.googlecode.com/svn/trunk@215 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleImage.cpp b/samplecode/SampleImage.cpp
index 7683e63..69cbd79 100644
--- a/samplecode/SampleImage.cpp
+++ b/samplecode/SampleImage.cpp
@@ -27,7 +27,7 @@
                         SkBitmap::Config pref, const char name[] = NULL)
 {
     if (SkImageDecoder::DecodeStream(stream, bitmap, pref,
-                                     SkImageDecoder::kDecodeBounds_Mode)) {
+                                 SkImageDecoder::kDecodeBounds_Mode, NULL)) {
         SkASSERT(bitmap->config() != SkBitmap::kNo_Config);
     
         SkImageRef* ref = new SkImageRef_GlobalPool(stream, bitmap->config());