Fix crash when compiling empty .vala file

Fixes bug 619422.

diff --git a/vala/valascanner.vala b/vala/valascanner.vala
index 420530ccb9d7ae6b36184fe01b58edc702f042dd..8099037223c0411a3a9b708896373e30a350397f 100644 (file)
--- a/vala/valascanner.vala
+++ b/vala/valascanner.vala
@@ -1469,7 +1469,8 @@ public class Vala.Scanner {
        }
 
        bool comment (bool file_comment = false) {
-               if (current > end - 2
+               if (current == null
+                   || current > end - 2
                    || current[0] != '/'
                    || (current[1] != '/' && current[1] != '*')) {
                        return false;