Remove parentheses from return statements

No reason to use "return (x);" here. Refer to the GNU coding guidelines
for details. Created using following semantic patch:

    @@
    expression expr;
    @@

    - return (expr);
    + return expr;

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/wins.c

@@ -201,7 +201,7 @@ wins_slctd_init (void)
 enum win
 wins_slctd (void)
 {
-  return (slctd_win);
+  return slctd_win;
 }
 
 /* Sets the selected window. */