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OS X Warning
Compiling on osx had this warning:
![image](https://user-images.githubusercontent.com/4185468/49400341-fe6f1e80-f711-11e8-959f-b12b111e09da.png)
Valgrind Warnings
Valgrind noted a printf of an uninitialized value, descr in fprintf.
![image](https://user-images.githubusercontent.com/4185468/49401628-b94ceb80-f715-11e8-82f0-ed75443147b2.png)
It also noted a memory leak, but that is a bigger change for another pull (#5).