Do not try to change directory when running Phan tests with no params

When running tests with:
PHAN=/path/to/phan/phan /path/to/mediawiki-core/tests/phan/bin/phan
the script changes to the home dir (does "cd" with no param),
which results in git error message (unless the home dir happens
to be a git repository).

Change-Id: Ib11e419fb5cca51ceaed0e9c7c86ae9c5c4ae0f2

diff --git a/tests/phan/bin/phan b/tests/phan/bin/phan
index 6ce1e84..61ad7da 100755 (executable)
--- a/tests/phan/bin/phan
+++ b/tests/phan/bin/phan
@@ -31,7 +31,7 @@ fi
 
 # If the first argument doesn't start with a -, then it's a path
 # to another project (extension, skin, etc.) to analyze
-if [[ "$1" != "-"* ]]; then
+if [[ -n "$1" && "$1" != "-"* ]]; then
        cd $1
        shift
 else