ATM-nicstar: Refactor a kmalloc() call in ns_init_card()

* The script "checkpatch.pl" can point out that assignments should usually
  not be performed within condition checks.
  Thus move an assignment for a local variable to a separate statement
  in this function.

* Replace the specification of a data structure by a pointer dereference
  as the parameter for the operator "sizeof" to make the corresponding size
  determination a bit safer according to the Linux coding style convention.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/atm/nicstar.c

@@ -370,7 +370,8 @@ static int ns_init_card(int i, struct pci_dev *pcidev)
 		return error;
         }
 
-	if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
+	card = kmalloc(sizeof(*card), GFP_KERNEL);
+	if (!card) {
 		printk
 		    ("nicstar%d: can't allocate memory for device structure.\n",
 		     i);