Ticket #5261: plugin.5261.fix.patch

plugin.php

@@ -189 +189 @@
 
         $r = isset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]);
 
-        unset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]);
-        unset($GLOBALS['merged_filters'][$tag]);
+        if( true === $r) {
+                unset($GLOBALS['wp_filter'][$tag][$priority][$function_to_remove]);
+                unset($GLOBALS['merged_filters'][$tag]);
+        }
 
         return $r;
 }