FileDiffDlg: Improve error reporting
treed5bec284b56bf7fb3d704a139fb2deea0d1fc017
-rw-r--r-- 429 .gitignore
-rw-r--r-- 881 .gitmodules
-rw-r--r-- 224 .mailmap
-rw-r--r-- 256 .tgitconfig
drwxr-xr-x - Languages
-rw-r--r-- 801 appveyor.yml
-rw-r--r-- 2439 build.txt
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
-rw-r--r-- 952 release.txt
drwxr-xr-x - src
drwxr-xr-x - test