[NTOSKRNL] Fail on pinning when there's no pin access set

Instead of assert, now, CcPinRead will just fail. This is
not consistent without Windows behavior, but still better
than asserting while testing!

ntoskrnl/cc/pin.c

@@ -186,7 +186,11 @@ CcPinMappedData (
 
     SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
     ASSERT(SharedCacheMap);
-    ASSERT(SharedCacheMap->PinAccess);
+    if (!SharedCacheMap->PinAccess)
+    {
+        DPRINT1("FIXME: Pinning a file with no pin access!\n");
+        return FALSE;
+    }
 
     iBcb = *Bcb;
     ASSERT(iBcb->Pinned == FALSE);