fix config file recompiling code

NEWS

@@ -1,3 +1,5 @@
+    - fix bug that makes config files recompile every time
+      (Nagger, Monte)
     - add dpi functionality to html_image, change "name"
       parameter to "file" (Thomas Shulz, Monte)
     - fix height/width parameter index in html_image (Gerard,

libs/Smarty.class.php

@@ -1301,13 +1301,9 @@ class Smarty
             $_compile_config = true;
         } else {
             include($_compile_file);
-            if(!empty($_config_vars)) {
-                $_compile_config = true;
-            } else {
-                $_compile_config = false;                    
-            }
+			$_compile_config = empty($_config_vars);
         }
-
+		
         if($_compile_config) {
             if(!is_object($this->_conf_obj)) {
                 require_once SMARTY_DIR . $this->config_class . '.class.php';