use isset() more to clean up notices

diff --git a/template.php b/template.php
index 7539a19..fa0affb 100644 (file)
--- a/template.php
+++ b/template.php
@@ -248,11 +248,11 @@ function tem_encoded_data($tag, $context)
 
 
 function is_sub_template(&$piece) {
-       return is_array($piece) and $piece['pieces'];
+       return is_array($piece) && isset($piece['pieces']);
 }
 
 function is_value_slot(&$piece) {
-       return is_array($piece) and !$piece['pieces'];
+       return is_array($piece) && !isset($piece['pieces']);
 }
 
 # Return a hash containing the top-level sub-templates of tem.
@@ -457,6 +457,9 @@ class tem {
        }
 
        function append($key, $value) {
+               if (!isset($this->data[$key])) {
+                       $this->data[$key] = '';
+               }
                $this->data[$key] .= $value;
        }
 
@@ -475,6 +478,9 @@ class tem {
        function show($name) {
                $tem = tem_is_old_sub($name, $this->template);
                if($tem) {
+                       if (!isset($this->data[$name])) {
+                               $this->data[$name] = '';
+                       }
                        $this->data[$name] .= fill_template($tem, $this->data);
                }
        }