affinity: avoid to init structure twice

In unix socket mode, suricata was doing multiple init of the
structure. This was not needed and caused a memory leak in
mutex creation.

src/util-affinity.c

@@ -83,6 +83,8 @@ ThreadsAffinityType thread_affinity[MAX_CPU_SET] = {
 
 };
 
+int thread_affinity_init_done = 0;
+
 /**
  * \brief find affinity by its name
  * \retval a pointer to the affinity or NULL if not found
@@ -191,7 +193,10 @@ void AffinitySetupLoadFromConfig()
     ConfNode *root = ConfGetNode("threading.cpu-affinity");
     ConfNode *affinity;
 
+    if (thread_affinity_init_done == 0) {
         AffinitySetupInit();
+        thread_affinity_init_done = 1;
+    }
 
     SCLogDebug("Load affinity from config\n");
     if (root == NULL) {