recognize $foo[][] syntax in embedded quotes without backticks

NEWS

@@ -1,3 +1,5 @@
+   - recognize $foo[][] syntax inside embedded quotes without
+     backtics (Monte)
    - name=123 is passed as an integer (not a string) to plugins now (messju)
    - $length is now propagated to sub-values in debug_print_var (messju) 
 

libs/Smarty_Compiler.class.php

@@ -1452,7 +1452,7 @@ class Smarty_Compiler extends Smarty {
     function _expand_quoted_text($var_expr)
     {
 		// if contains unescaped $, expand it
-		if(preg_match_all('%(?<!\\\\)\$(?:\`' . $this->_dvar_guts_regexp . '\`|\w+)%', $var_expr, $_match)) {
+		if(preg_match_all('%(?<!\\\\)\$(?:\`' . $this->_dvar_guts_regexp . '\`|\w+(\[[a-zA-Z0-9]+\])*)%', $var_expr, $_match)) {
 			$_match = $_match[0];
 			rsort($_match);
 			reset($_match);