git-gui: Change prior tree SHA-1 verification to use git_read
This cat-file was done on maint, where we did not have git_read
available to us. But here on master we do, so we should make
use of it.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
diff --git a/lib/commit.tcl b/lib/commit.tcl
index 3172d7c..46a78c1 100644
--- a/lib/commit.tcl
+++ b/lib/commit.tcl
@@ -258,7 +258,7 @@
# -- Verify this wasn't an empty change.
#
if {$commit_type eq {normal}} {
- set fd_ot [open "| git cat-file commit $PARENT" r]
+ set fd_ot [git_read cat-file commit $PARENT]
fconfigure $fd_ot -encoding binary -translation lf
set old_tree [gets $fd_ot]
close $fd_ot
