Convert SHA256_LENGTH from a constant-in-anonymous-enum to a static const. This defines the cons...

crypto/sha2.cc

Index: crypto/sha2.cc
===================================================================
--- crypto/sha2.cc	(revision 98481)
+++ crypto/sha2.cc	(working copy)
@@ -17,7 +17,7 @@
 }
 
 std::string SHA256HashString(const std::string& str) {
-  std::string output(SHA256_LENGTH, 0);
+  std::string output(kSHA256Length, 0);
   SHA256HashString(str, string_as_array(&output), output.size());
   return output;
 }