Removes warnings generated by gcc and clang.



git-svn-id: http://skia.googlecode.com/svn/trunk@2651 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 7284cac..35a822a 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -156,6 +156,9 @@
                     return false;
                 }
                 break;
+            case kRaster_DeviceType:
+            case kPicture_DeviceType:
+                break;
         }
         return true;
     }
@@ -1009,6 +1012,8 @@
                 fPicture = new SkPicture;
                 canvas = fPicture->beginRecording(9999, 9999);
                 break;
+            case kNullGPU_DeviceType:
+                break;
         }
     }