setup.sh: Use sed_i().

diff --git a/setup.sh b/setup.sh
index 0e456ac34a90cf38e74972ccd4d311c38973df45..6506171c57ef5625d06f0e578fe216a977323812 100755 (executable)
--- a/setup.sh
+++ b/setup.sh
@@ -46,10 +46,8 @@ if installed X; then
          } else {
              print $_;
          }'
-    # Xdefaults uses ! as comment instead of #. tmp file necessary because of
-    # different implementations of `sed -i`.
-    sed 's/^#/!/' Xdefaults > Xdefaults.tmp
-    mv Xdefaults.tmp Xdefaults
+    # Xdefaults uses ! as comment instead of #.
+    sed_i 's/^#/!/' Xdefaults
 
     if test ! "x`os`" = xdarwin; then
         link xinitrc ~/.xinitrc