bin/deploy_docs in blocks-3.0.4 vs bin/deploy_docs in blocks-4.0.0.rc1

@@ -25,10 +25,10 @@
 }
 
 function deploy {
 	echo "deploying changes"
 
-	if [ -z "$TRAVIS_PULL_REQUEST" ]; then
+	if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then
 	    echo "except don't publish site for pull requests"
 	    exit 0
 	fi
 
 	if [ "$TRAVIS_BRANCH" != "master" ]; then
\ No newline at end of file