Reset label_nest_level before parsing reference.

This fixes a bug with text like:

    [[some unrelated text [link]

    [link]: destination

See #146.

1 files changed, 1 insertions, 0 deletions

diff --git a/js/stmd.js b/js/stmd.js
index e227578..bc6b2d1 100755
--- a/js/stmd.js
+++ b/js/stmd.js
@@ -2768,6 +2768,7 @@
     var parseReference = function(s, refmap) {
         this.subject = s;
         this.pos = 0;
+        this.label_nest_level = 0;
         var rawlabel;
         var dest;
         var title;