detect/loader: set proper thread flags

Fixes: 13beba141c ("source: add THV_RUNNING flag to notify of running state")

Bug: #6043.

src/detect-engine-loader.c

@@ -582,6 +582,7 @@ static TmEcode DetectLoader(ThreadVars *th_v, void *thread_data)
     DetectLoaderThreadData *ftd = (DetectLoaderThreadData *)thread_data;
     BUG_ON(ftd == NULL);
 
+    TmThreadsSetFlag(th_v, THV_INIT_DONE | THV_RUNNING);
     SCLogDebug("loader thread started");
     while (1)
     {
@@ -619,6 +620,10 @@ static TmEcode DetectLoader(ThreadVars *th_v, void *thread_data)
         SCLogDebug("woke up...");
     }
 
+    TmThreadsSetFlag(th_v, THV_RUNNING_DONE);
+    TmThreadWaitForFlag(th_v, THV_DEINIT);
+    TmThreadsSetFlag(th_v, THV_CLOSED);
+
     return TM_ECODE_OK;
 }