create-pull-request: Error message on missing -u

The script was erroring out without a hint on what failed.

(From OE-Core rev: 72266cfa3a12a19a94d9176ecca9d080658dbf2e)

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/create-pull-request

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2010-2011,  Intel Corporation.
+# Copyright (c) 2010-2013,  Intel Corporation.
 # All Rights Reserved
 # 
 # This program is free software;  you can redistribute it and/or modify
@@ -124,8 +124,9 @@ if [ -z "$BRANCH" ]; then
 	BRANCH=$(git branch | grep -e "^\* " | cut -d' ' -f2)
 	echo "NOTE: Assuming remote branch '$BRANCH', use -b to override."
 fi
-	
+
 if [ -z "$REMOTE_URL" ]; then
+	echo "ERROR: Missing parameter -u, no git remote!"
 	usage
 	exit 1
 fi