Bugzilla Bug 341122: it's not necessary to test slot->slotLock because

slot->slotLock cannot be NULL at that point.  The patch is contributed by
Ryan Jones <sciguyryan+bugzilla@gmail.com>. r=nelsonb,wtc.

security/nss/lib/softoken/pkcs11.c

@@ -2856,10 +2856,8 @@ SFTK_DestroySlotData(SFTKSlot *slot)
 
     /* OK everything has been disassembled, now we can finally get rid
      * of the locks */
-    if (slot->slotLock) {
-	PZ_DestroyLock(slot->slotLock);
-	slot->slotLock = NULL;
-    }
+    PZ_DestroyLock(slot->slotLock);
+    slot->slotLock = NULL;
     if (slot->sessionLock) {
 	for (i=0; i < slot->numSessionLocks; i++) {
 	    if (slot->sessionLock[i]) {