wildcard_match_arm: add lint properly.

Author: Aehmlo

CHANGELOG.md

@@ -1028,6 +1028,7 @@ All notable changes to this project will be documented in this file.
 [`while_let_loop`]: https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
 [`while_let_on_iterator`]: https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
 [`wildcard_dependencies`]: https://rust-lang.github.io/rust-clippy/master/index.html#wildcard_dependencies
+[`wildcard_match_arm`]: https://rust-lang.github.io/rust-clippy/master/index.html#wildcard_match_arm
 [`write_literal`]: https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
 [`write_with_newline`]: https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
 [`writeln_empty_string`]: https://rust-lang.github.io/rust-clippy/master/index.html#writeln_empty_string

clippy_lints/src/lib.rs

@@ -499,6 +499,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry<'_>, conf: &Conf) {
         indexing_slicing::INDEXING_SLICING,
         inherent_impl::MULTIPLE_INHERENT_IMPL,
         literal_representation::DECIMAL_LITERAL_REPRESENTATION,
+        matches::WILDCARD_MATCH_ARM,
         mem_forget::MEM_FORGET,
         methods::CLONE_ON_REF_PTR,
         methods::OPTION_UNWRAP_USED,