in sqgetGlobalVar, reset $value if it is not found.

functions/global.php

@@ -237,6 +237,8 @@ function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) {
         }
         break;
     }
+    /* Nothing found, reset $value and return FALSE */
+    $value = null;
     return FALSE;
 }
 
@@ -287,4 +289,4 @@ function sqsession_is_active() {
 }
 
 // vim: et ts=4
-?>
+?>