better ref error handling

lib/marked.js

@@ -323,10 +323,11 @@ inline.lexer = function(str) {
         break;
       case 'link':
       case 'reflink':
-        if (cap[0][0] !== '!') {
         if (key === 'reflink') {
           link = links[cap[2]] || links[cap[1]];
           if (!link) {
+            // apparently markdown says you're
+            // supposed to do this ...?
             out += cap[0];
             break;
           }
@@ -339,6 +340,7 @@ inline.lexer = function(str) {
             title: text[2]
           };
         }
+        if (cap[0][0] !== '!') {
           out += '<a href="' 
             + escape(link.href) 
             + '"' 
@@ -351,17 +353,6 @@ inline.lexer = function(str) {
             + inline.lexer(cap[1])
             + '</a>';
         } else {
-          if (key === 'reflink') {
-            link = links[cap[2]];
-            if (!link) throw new 
-              Error('Undefined Reference: ' + cap[2]);
-          } else {
-            text = /^\s*([^\s]*)(?:\s+"([^"]+)")?\s*$/.exec(cap[2]);
-            link = {
-              href: text[1],
-              title: text[2]
-            };
-          }
           out += '<img src="' 
             + escape(link.href)
             + '" alt="'