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>

randr/rrscreen.c

@@ -951,8 +951,7 @@ ProcRRSetScreenConfig (ClientPtr client)
     
 sendReply:
     
-    if (pData)
-	free(pData);
+    free(pData);
 
     rep.type = X_Reply;
     /* rep.status has already been filled in */