Remove to_string, replacing with std::to_string

Convert to_u32bit to use the new C++0x library func stoul instead of
hand-written code.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/pubkey/pubkey.cpp b/src/pubkey/pubkey.cpp
index 4ddaa6fb6..5a5ca335e 100644
--- a/src/pubkey/pubkey.cpp
+++ b/src/pubkey/pubkey.cpp
@@ -216,7 +216,7 @@ SecureVector<byte> PK_Signer::signature(RandomNumberGenerator& rng)
       }
    else
       throw Encoding_Error("PK_Signer: Unknown signature format " +
-                           to_string(sig_format));
+                           std::to_string(sig_format));
    }
 
 /*
@@ -328,7 +328,7 @@ bool PK_Verifier::check_signature(const byte sig[], u32bit length)
          }
       else
          throw Decoding_Error("PK_Verifier: Unknown signature format " +
-                              to_string(sig_format));
+                              std::to_string(sig_format));
       }
    catch(Invalid_Argument) { return false; }
    catch(Decoding_Error) { return false; }