Fix bash math for `git bash` alias.

bootstrap/win/git-bash.template.sh

 #!/usr/bin/env bash
 export EDITOR=${EDITOR:=notepad}
 WIN_BASE=`dirname $0`
 UNIX_BASE=`cygpath "$WIN_BASE"`
 export PATH=$PATH:$UNIX_BASE/SVN_BIN_DIR:$UNIX_BASE/PYTHON_BIN_DIR:$UNIX_BASE/PYTHON_BIN_DIR/Scripts
 export PYTHON_DIRECT=1
 export PYTHONUNBUFFERED=1
-if [[ $# > 1 ]]; then
+if [[ $# > 0 ]]; then
   $UNIX_BASE/GIT_BIN_DIR/bin/bash.exe "$@"
 else
   $UNIX_BASE/GIT_BIN_DIR/git-bash.exe &
 fi