git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/git-merge-one-file.sh b/git-merge-one-file.sh
index 1e7727d2763e744b94f55c2056eccaab12367c9e..9ee3f804520eadb322de3d0ea70a2bf9f092b089 100755 (executable)
--- a/git-merge-one-file.sh
+++ b/git-merge-one-file.sh
@@ -80,6 +80,10 @@ case "${1:-.}${2:-.}${3:-.}" in
                echo "ERROR: $4: Not merging symbolic link changes."
                exit 1
                ;;
+       *,160000,*)
+               echo "ERROR: $4: Not merging conflicting submodule changes."
+               exit 1
+               ;;
        esac
 
        src2=`git-unpack-file $3`