util: jsoncompat: Stub out virJSONInitialize when compiling without jansson

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/util/virjsoncompat.c

@@ -271,4 +271,15 @@ json_true_impl(void)
     return json_true_ptr();
 }
 
-#endif /* WITH_JANSSON */
+
+#else /* !WITH_JANSSON */
+
+
+int
+virJSONInitialize(void)
+{
+    return 0;
+}
+
+
+#endif /* !WITH_JANSSON */