Fixing issue with HgWeb import where an empty repository causes lockup

Author: Peter Birch

SourceHgWeb/SourceHgWeb.php

@@ -251,7 +251,10 @@ private function commit_changeset( $p_repo, $p_input, $p_branch='' ) {
 		$i = 0;
 
 		# Skip changeset header
-		while( strpos( $t_input[$i++], '# HG changeset patch' ) === false );
+		while( $i < count( $t_input ) && strpos( $t_input[$i++], '# HG changeset patch' ) === false );
+
+		# Check we haven't exhausted the input
+		if ( $i == count( $t_input )) return array (null, array());
 
 		# Process changeset metadata
 		$t_commit = array();