Use internal temp variable for swap macros

Also, fix whitespace, mainly around
	swaps(&rep.sequenceNumber)

Reviewed-by: Peter Harris <pharris@opentext.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>

Xi/setmmap.c

@@ -73,10 +73,8 @@ SOFTWARE.
 int
 SProcXSetDeviceModifierMapping(ClientPtr client)
 {
-    char n;
-
     REQUEST(xSetDeviceModifierMappingReq);
-    swaps(&stuff->length, n);
+    swaps(&stuff->length);
     return (ProcXSetDeviceModifierMapping(client));
 }
 
@@ -140,9 +138,7 @@ void
 SRepXSetDeviceModifierMapping(ClientPtr client, int size,
 			      xSetDeviceModifierMappingReply * rep)
 {
-    char n;
-
-    swaps(&rep->sequenceNumber, n);
-    swapl(&rep->length, n);
+    swaps(&rep->sequenceNumber);
+    swapl(&rep->length);
     WriteToClient(client, size, (char *)rep);
 }