Add error checking to chmod on package submission

Try submitting an empty form to the aur

Signed-off-by: Callan Barrett <wizzomafizzo@gmail.com>
Signed-off-by: Loui Chang <louipc.ist@gmail.com>

web/html/pkgsubmit.php

@@ -241,7 +241,7 @@ if ($_COOKIE["AURSID"]):
 		}
 
 		# Chmod files after everything has been done.
-		if (!chmod_group($incoming_pkgdir)) {
+		if (!error && !chmod_group($incoming_pkgdir)) {
 			$error = __("Could not chmod directory %s.", $incoming_pkgdir);
 		}