The big NULL replacement party part 2.

This may take a bit. Trying to do this by operator/command.

extern/jsoncpp/src/lib_json/json_writer.cpp

@@ -111,7 +111,7 @@ std::string valueToString( bool value )
 std::string valueToQuotedString( const char *value )
 {
    // Not sure how to handle unicode...
-   if (strpbrk(value, "\"\\\b\f\n\r\t") == NULL && !containsControlCharacter( value ))
+   if (strpbrk(value, "\"\\\b\f\n\r\t") == nullptr && !containsControlCharacter( value ))
       return std::string("\"") + value + "\"";
    // We have to walk value and escape any special characters.
    // Appending to std::string is not efficient, but this should be rare.