stats api: call thread deinit API functions

Thread deinit funcs weren't called. This meant the lua scripts 'deinit'
functions weren't called either.

src/counters.c

@@ -320,6 +320,12 @@ static void *SCPerfMgmtThread(void *arg)
     TmThreadsSetFlag(tv_local, THV_RUNNING_DONE);
     TmThreadWaitForFlag(tv_local, THV_DEINIT);
 
+    r = tm->ThreadDeinit(tv_local, stats_thread_data);
+    if (r != TM_ECODE_OK) {
+        SCLogError(SC_ERR_THREAD_DEINIT, "Perf Counter API "
+                   "ThreadDeinit failed");
+    }
+
     TmThreadsSetFlag(tv_local, THV_CLOSED);
     return NULL;
 }

src/util-error.c

@@ -114,6 +114,7 @@ const char * SCErrorToString(SCError err)
         CASE_CODE (SC_ERR_THREAD_SPAWN);
         CASE_CODE (SC_ERR_THREAD_CREATE);
         CASE_CODE (SC_ERR_THREAD_INIT);
+        CASE_CODE (SC_ERR_THREAD_DEINIT);
         CASE_CODE (SC_ERR_THRESHOLD_HASH_ADD);
         CASE_CODE (SC_ERR_UNDEFINED_VAR);
         CASE_CODE (SC_ERR_RULE_KEYWORD_UNKNOWN);

src/util-error.h

@@ -294,6 +294,7 @@ typedef enum {
     SC_ERR_NO_NETMAP,
     SC_ERR_NETMAP_CREATE,
     SC_ERR_NETMAP_READ,
+    SC_ERR_THREAD_DEINIT, /**< thread's deinit function failed */
 } SCError;
 
 const char *SCErrorToString(SCError);