Fix clang warning in GMSampleView.h

../../samplecode/GMSampleView.h:23:7: warning: field 'fGM' will be initialized after field 'fShowSize' [-Wreorder]

R=bsalomon@google.com

Review URL: https://codereview.appspot.com/6856063

git-svn-id: http://skia.googlecode.com/svn/trunk@6507 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/GMSampleView.h b/samplecode/GMSampleView.h
index 93bafca..6791c34 100644
--- a/samplecode/GMSampleView.h
+++ b/samplecode/GMSampleView.h
@@ -20,7 +20,7 @@
 
 public:
     GMSampleView(GM* gm)
-    : fGM(gm), fShowSize(false) {}
+    : fShowSize(false), fGM(gm) {}
 
     virtual ~GMSampleView() {
         delete fGM;