yet another memcpy -> sk_careful_memcpy

include/core/SkWriter32.h

Index: include/core/SkWriter32.h
diff --git a/include/core/SkWriter32.h b/include/core/SkWriter32.h
index 59c499e631240a751e93a4b468b2b6053f1f5775..1e7ec6d3483e12cf4f49db56734ea8f453fcb4e1 100644
--- a/include/core/SkWriter32.h
+++ b/include/core/SkWriter32.h
@@ -186,7 +186,7 @@ public:
      *  Write size bytes from src, and pad to 4 byte alignment with zeroes.
      */
     void writePad(const void* src, size_t size) {
-        memcpy(this->reservePad(size), src, size);
+        sk_careful_memcpy(this->reservePad(size), src, size);
     }
 
     /**