proto_hep: replace atomic_ulong with portable atomic_t

This fixes compile error on RedHat/CentOS 7

Author: razvancrainea

modules/proto_hep/hep.c

@@ -51,8 +51,8 @@
 #define HEP_PROTO_SIP  0x01
 
 static int control_id = -1;
-atomic_ulong *hep_failed_retries;
-atomic_ulong *hep_last_attempt;
+atomic_t *hep_failed_retries;
+atomic_t *hep_last_attempt;
 
 struct hep_message_id {
 	char* proto;

modules/proto_hep/proto_hep.c

@@ -94,8 +94,8 @@ int hep_capture_id = 1;
 int payload_compression = 0;
 int hep_max_retries = 5;
 int hep_retry_cooldown = 3600; //seconds
-extern atomic_ulong *hep_failed_retries;
-extern atomic_ulong *hep_last_attempt;
+extern atomic_t *hep_failed_retries;
+extern atomic_t *hep_last_attempt;
 
 int homer5_on = 1;
 str homer5_delim = {":", 0};
@@ -195,8 +195,8 @@ struct module_exports exports = {
 static int mod_init(void)
 {
 	struct {
-		atomic_ulong hep_failed_retries;
-		atomic_ulong hep_last_attempt;
+		atomic_t hep_failed_retries;
+		atomic_t hep_last_attempt;
 	} *sh_holders;
 
 	/* check if any listeners defined for this proto */