tree-diff: allow diff_tree_sha1 to accept NULL sha1

diff --git a/git-gui/GIT-VERSION-GEN b/git-gui/GIT-VERSION-GEN
index 0a1f8d4f8a9187a0d5decf20f9c926dbd570a8db..a9ea21826a4ce016cfa270ac5945f29d10fb897d 100755 (executable)
--- a/git-gui/GIT-VERSION-GEN
+++ b/git-gui/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=0.18.GITGUI
+DEF_VER=0.19.GITGUI
 
 LF='
 '