Allow wparam and lparam in similar_names

tests/ui/similar_names.rs

@@ -72,6 +72,10 @@ fn main() {
     let rx1: i32;
     let tx_cake: i32;
     let rx_cake: i32;
+
+    // names often used in win32 code (for example WindowProc)
+    let wparam: i32;
+    let lparam: i32;
 }
 
 fn foo() {

tests/ui/similar_names.stderr

@@ -92,13 +92,13 @@ LL |     let parsee: i32;
    |         ^^^^^^
 
 error: binding's name is too similar to existing binding
-  --> $DIR/similar_names.rs:81:16
+  --> $DIR/similar_names.rs:85:16
    |
 LL |         bpple: sprang,
    |                ^^^^^^
    |
 note: existing binding defined here
-  --> $DIR/similar_names.rs:80:16
+  --> $DIR/similar_names.rs:84:16
    |
 LL |         apple: spring,
    |                ^^^^^^