- added check for existing TAG file before catting it

diff --git a/build/branch.sh b/build/branch.sh
index 64c702e..023a3f1 100755 (executable)
--- a/build/branch.sh
+++ b/build/branch.sh
@@ -31,7 +31,7 @@ case $child in
   *) child="b_$child"
 esac
 
-if [ "$parent" != "HEAD" -a "`cat $dir/CVS/Tag`" != "T$parent" ]; then
+if test "$parent" != "HEAD" && test -f $dir/CVS/Tag && "`cat $dir/CVS/Tag`" != "T$parent"; then
        echo "This script must be run within the $parent branch"
        exit 1
 fi