Silence warning after f5e315ccf1a.

tools/PictureRenderer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "PictureRenderer.h"
 #include "picture_utils.h"
 #include "SamplePipeControllers.h"
@@ skipping 329 matching lines @@
     SkString outputFilename(inputFilename);
     outputFilename.remove(outputFilename.size() - 4, 4);
     if (NULL != numberToAppend) {
         outputFilename.appendf("%i", *numberToAppend);
     }
     outputFilename.append(".png");
     // TODO(epoger): what about including the config type within outputFilename?  That way,
     // we could combine results of different config types without conflicting filenames.
 
     if (NULL != jsonSummaryPtr) {
-        if (!generatedHash) {
-            SkAssertResult(SkBitmapHasher::ComputeDigest(bitmap, &hash));
-            generatedHash = true;
-        }
+        SkASSERT(!generatedHash);
+        SkAssertResult(SkBitmapHasher::ComputeDigest(bitmap, &hash));
+        generatedHash = true;
+
         jsonSummaryPtr->add(outputFilename.c_str(), hash);
     }
 
     // Update outputFilename AFTER adding to JSON summary, but BEFORE writing out the image file.
     if (useChecksumBasedFilenames) {
         if (!generatedHash) {
             SkAssertResult(SkBitmapHasher::ComputeDigest(bitmap, &hash));
             generatedHash = true;
         }
         outputFilename.set(kJsonKey_Hashtype_Bitmap_64bitMD5);
@@ skipping 634 matching lines @@
     virtual SkString getConfigNameInternal() SK_OVERRIDE {
         return SkString("picture_clone");
     }
 };
 
 PictureRenderer* CreatePictureCloneRenderer() {
     return SkNEW(PictureCloneRenderer);
 }
 
 } // namespace sk_tools