return error when source is not provided and include-mint flag is not present for withdraw-withheld-tokens command

Author: zzau13

token/cli/src/command.rs

@@ -2841,6 +2841,11 @@ async fn command_withdraw_withheld_tokens(
     if config.sign_only {
         panic!("Config can not be sign-only for withdrawing withheld tokens.");
     }
+    if source_token_accounts.is_empty() && !include_mint {
+        return Err("No source accounts for withheld tokens provided. \
+        Please include a list of pubkeys to withdraw from, or the --include-mint \
+        flag to withdraw tokens withheld in the mint.".into());
+    }
     let destination_account = config
         .get_account_checked(&destination_token_account)
         .await?;