virhostdev.h: remove ATTRIBUTE_NONNULL from oldStateDir

In libxl driver oldStateDir is NULL when calling
virHostdevReAttachDomainHostdevs. This is allowed.
Remove ATTRIBUTE_NONNULL setting from oldStateDir.

Introduced by commit 6225cb3d.
Signed-off-by: NChunyan Liu <cyliu@suse.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/util/virhostdev.h

@@ -142,7 +142,7 @@ virHostdevReAttachDomainDevices(virHostdevManagerPtr mgr,
                                 virDomainDefPtr def,
                                 unsigned int flags,
                                 const char *oldStateDir)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(5);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
 
 /* functions used by NodeDevDetach/Reattach/Reset */
 int virHostdevPCINodeDeviceDetach(virHostdevManagerPtr mgr,