Do not crash on getting the history for a file that is not in the index
treeefd332e118ceeb75df6b09bfea2a80d5bb82437f
-rw-r--r-- 5351 README
-rw-r--r-- 12982 SUBMITTING_PATCHES
-rw-r--r-- 5043 TODO
drwxr-xr-x - org.spearce.egit.core.test
drwxr-xr-x - org.spearce.egit.core
drwxr-xr-x - org.spearce.egit.ui
drwxr-xr-x - org.spearce.jgit