!11863 [MD][codex] Fix numa_iterface codex problem

From: @xiefangqi
Reviewed-by: @pandoublefeng,@heleiwang
Signed-off-by: @pandoublefeng

mindspore/ccsrc/minddata/dataset/util/numa_interface.cc

@@ -19,6 +19,9 @@
 namespace mindspore {
 namespace dataset {
 inline void *LoadLibrary(const char *name) {
+  if (name == nullptr) {
+    return nullptr;
+  }
   auto handle = dlopen(name, RTLD_LAZY | RTLD_LOCAL);
   return handle;
 }