mailmap: fix Christian Dietz

ctrueden · ctrueden · commit 4f1e9023bb1c · 2014-05-19T16:58:27.000-05:00
diff --git a/.mailmap b/.mailmap
@@ -1,3 +1,4 @@
 Barry DeZonia <bdezonia@wisc.edu> <bdezonia@users.noreply.github.com>
+Christian Dietz <christian.dietz@uni-konstanz.de>
 Johannes Schindelin <johannes.schindelin@gmx.de>
 Mark Hiner <hiner@wisc.edu> <hinerm@gmail.com>
