Fix bash math for `git bash` alias.

Previous calculation was off-by-one.

TBR=dnj@chromium.org, mmoss@chromium.org
BUG=598956

Review URL: https://codereview.chromium.org/1848793004 .

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299619 0039d316-1c4b-4281-b951-d872f2087c98

bootstrap/win/git-bash.template.sh

@@ -5,7 +5,7 @@ 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 &