Remove more superfluous if(p) checks around free(p)

This patch has been generated by the following Coccinelle semantic patch:

@@
expression E;
@@

-if(E) { free(E); }
+free(E);

Signed-off-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Fernando Carrijo <fcarrijo@yahoo.com.br>
Reviewed-by: Matt Turner <mattst88@gmail.com>

xkb/xkbLEDs.c

@@ -605,8 +605,8 @@ void
 XkbFreeSrvLedInfo(XkbSrvLedInfoPtr sli)
 {
     if ((sli->flags&XkbSLI_IsDefault)==0) {
-	if (sli->maps)	free(sli->maps);
-	if (sli->names)	free(sli->names);
+	free(sli->maps);
+	free(sli->names);
     }
     sli->maps= NULL;
     sli->names= NULL;