Fixed parser bug with invalid nesting

CHANGELOG.txt

@@ -1,3 +1,8 @@
+Version 1.5.2:
+	Fixed BBCode parser bug that can cause content to be lost under certain
+		types of invalid nesting.
+		- Thanks to Jones for reporting.
+
 Version 1.5.1:
 	Fixed bug with event handlers throwing an error.
 		- Thanks to @agungsijawir for reporting

src/plugins/bbcode.js

@@ -752,7 +752,7 @@
 								// previously cloned tags as it's children
 								clone = curTok.clone();
 
-								if (cloned.length > 1) {
+								if (cloned.length) {
 									clone.children.push(last(cloned));
 								}
 

tests/unit/plugins/bbcode.parser.js

@@ -116,6 +116,13 @@ define([
 			'[color][b][s][i]test[/i][/s][/b][/color]',
 			'Closing parent tag from deeply nested child tag'
 		);
+
+		assert.equal(
+			this.parser.toBBCode('[left][list][*]xyz[/left][list][*]abc[/list]'),
+			'[left][list]\n[*]xyz[/*]\n[/list]\n[/left]\n[list]\n[*][list]\n' +
+				'[*]abc[/*]\n[/list]\n[/*]\n[/list]\n',
+			'Closing parent tag from list item'
+		);
 	});