Add log message on unexpected html end tags

Author: rreusser

src/lib/svg_text_utils.js

@@ -402,7 +402,10 @@ function buildSVGText(containerNode, str) {
     function exitNode(type) {
         // A bare closing tag can't close the root node. If we encounter this it
         // means there's an extra closing tag that can just be ignored:
-        if(nodeStack.length === 1) return;
+        if(nodeStack.length === 1) {
+            Lib.log('Ignoring unexpected end tag </' + type + '>.', str);
+            return;
+        }
 
         var innerNode = nodeStack.pop();