Fix build: these asserts are always now true, which GCC warns about

src/pipe/SkGPipeRead.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkBitmapHeap.h"
@@ skipping 213 matching lines @@
     SkTDArray<SkBitmap*>      fBitmaps;
     bool                      fSilent;
     // Only used when sharing bitmaps with the writer.
     SkBitmapHeap*             fSharedHeap;
     unsigned                  fFlags;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 template <typename T> const T* skip(SkReader32* reader, size_t count = 1) {
-    SkASSERT(count >= 0);
     size_t size = sizeof(T) * count;
     SkASSERT(SkAlign4(size) == size);
     return reinterpret_cast<const T*>(reader->skip(size));
 }
 
 template <typename T> const T* skipAlign(SkReader32* reader, size_t count = 1) {
-    SkASSERT(count >= 0);
     size_t size = SkAlign4(sizeof(T) * count);
     return reinterpret_cast<const T*>(reader->skip(size));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
 static void clipPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
                         SkGPipeState* state) {
     SkPath path;
@@ skipping 647 matching lines @@
                 status = kReadAtom_Status;
                 break;
             }
     }
 
     if (bytesRead) {
         *bytesRead = reader.offset();
     }
     return status;
 }