fix warning/error of uninitialized len

src/core/SkScalerContext.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkScalerContext.h"
@@ skipping 95 matching lines @@
     SkDebugf("  frame %g miter %g hints %d framefill %d format %d join %d\n",
         rec->fFrameWidth, rec->fMiterLimit, rec->fHints, rec->fFrameAndFill,
         rec->fMaskFormat, rec->fStrokeJoin);
     SkDebugf("  pathEffect %x maskFilter %x\n",
              desc->findEntry(kPathEffect_SkDescriptorTag, NULL),
         desc->findEntry(kMaskFilter_SkDescriptorTag, NULL));
 #endif
 #ifdef SK_BUILD_FOR_ANDROID
     uint32_t len;
     const void* data = desc->findEntry(kAndroidOpts_SkDescriptorTag, &len);
-    SkASSERT(data);
-    SkOrderedReadBuffer buffer(data, len);
-    fPaintOptionsAndroid.unflatten(buffer);
-    SkASSERT(buffer.offset() == buffer.size());
+    if (data) {
+        SkOrderedReadBuffer buffer(data, len);
+        fPaintOptionsAndroid.unflatten(buffer);
+        SkASSERT(buffer.offset() == buffer.size());
+    }
 #endif
 }
 
 SkScalerContext::~SkScalerContext() {
     SkDELETE(fNextContext);
 
     SkSafeUnref(fPathEffect);
     SkSafeUnref(fMaskFilter);
     SkSafeUnref(fRasterizer);
 }
@@ skipping 728 matching lines @@
     SkScalerContext* c = NULL;  //SkCreateColorScalerContext(desc);
     if (NULL == c) {
         c = this->onCreateScalerContext(desc);
     }
     if (NULL == c) {
         c = SkNEW_ARGS(SkScalerContext_Empty,
                        (const_cast<SkTypeface*>(this), desc));
     }
     return c;
 }