Merge pull request #286 from dnephin/merge_flags_before_adding_help

Merge persistent flags before checking for a help flag

command.go

@@ -735,6 +735,7 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
 }
 
 func (c *Command) initHelpFlag() {
+	c.mergePersistentFlags()
 	if c.Flags().Lookup("help") == nil {
 		c.Flags().BoolP("help", "h", false, "help for "+c.Name())
 	}