Replace std::to_string with locale-independent alternative

src/rpc/rawtransaction.cpp

@@ -30,6 +30,7 @@
 #include <uint256.h>
 #include <util/moneystr.h>
 #include <util/strencodings.h>
+#include <util/string.h>
 #include <validation.h>
 #include <validationinterface.h>
 
@@ -960,7 +961,7 @@ static std::string WriteHDKeypath(std::vector<uint32_t>& keypath)
             num &= ~0x80000000;
         }
 
-        keypath_str += std::to_string(num);
+        keypath_str += ToString(num);
         if (hardened) {
             keypath_str += "'";
         }