conf: Remove NONNULL(1) for virDomainNumaGetNodeCount

Since the code checks and handles a NULL 'numa' parameter, remove the NONNULL
from the prototype.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/conf/numa_conf.h

@@ -85,8 +85,8 @@ int virDomainNumatuneMaybeGetNodeset(virDomainNumaPtr numatune,
                                      virBitmapPtr *retNodeset,
                                      int cellid);
 
-size_t virDomainNumaGetNodeCount(virDomainNumaPtr numa)
-    ATTRIBUTE_NONNULL(1);
+size_t virDomainNumaGetNodeCount(virDomainNumaPtr numa);
+
 virBitmapPtr virDomainNumaGetNodeCpumask(virDomainNumaPtr numa,
                                          size_t node)
     ATTRIBUTE_NONNULL(1);