libwebp: update to 0.4.2-rc2

third_party/libwebp/utils/utils.c

 // Copyright 2012 Google Inc. All Rights Reserved.
 //
 // Use of this source code is governed by a BSD-style license
 // that can be found in the COPYING file in the root of the source
 // tree. An additional intellectual property rights grant can be found
 // in the file PATENTS. All contributing project authors may
 // be found in the AUTHORS file in the root of the source tree.
 // -----------------------------------------------------------------------------
 //
 // Misc. common utility functions
@@ skipping 137 matching lines @@
 #if defined(PRINT_MEM_TRAFFIC)
       fprintf(stderr, "Mem: %u (-%u)\n",
               (uint32_t)total_mem, (uint32_t)block->size_);
 #endif
       free(block);
     }
   }
 }
 
 #else
-#define Increment(v) do {} while(0)
-#define AddMem(p, s) do {} while(0)
-#define SubMem(p)    do {} while(0)
+#define Increment(v) do {} while (0)
+#define AddMem(p, s) do {} while (0)
+#define SubMem(p)    do {} while (0)
 #endif
 
 // Returns 0 in case of overflow of nmemb * size.
 static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) {
   const uint64_t total_size = nmemb * size;
   if (nmemb == 0) return 1;
   if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0;
   if (total_size != (size_t)total_size) return 0;
 #if defined(PRINT_MEM_INFO) && defined(MALLOC_FAIL_AT)
   if (countdown_to_fail > 0 && --countdown_to_fail == 0) {
@@ skipping 31 matching lines @@
 
 void WebPSafeFree(void* const ptr) {
   if (ptr != NULL) {
     Increment(&num_free_calls);
     SubMem(ptr);
   }
   free(ptr);
 }
 
 //------------------------------------------------------------------------------