Handle libgit exception when calling GitRev::GetParentFromHash()
tree4f0909e09155a51fe08e0e610cc61d0c618767b2
-rw-r--r-- 512 .gitignore
-rw-r--r-- 543 .gitmodules
-rw-r--r-- 224 .mailmap
drwxr-xr-x - Languages
-rw-r--r-- 2173 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
-rw-r--r-- 1742 release.txt
drwxr-xr-x - src
drwxr-xr-x - test