file: use enum for state

Makes debugging easier.

src/util-file.h

@@ -64,7 +64,7 @@ typedef enum FileState_ {
 typedef struct File_ {
     uint16_t flags;
     uint16_t name_len;
-    int16_t state;
+    FileState state;
     StreamingBuffer *sb;
     uint64_t txid;                  /**< tx this file is part of */
     uint32_t file_track_id;         /**< id used by protocol parser. Optional

src/util-lua-common.c

@@ -803,6 +803,14 @@ static int LuaCallbackFileStatePushToStackFromFile(lua_State *luastate, const Fi
         case FILE_STATE_ERROR:
             state = "ERROR";
             break;
+        case FILE_STATE_OPENED:
+            state = "OPENED";
+            break;
+        case FILE_STATE_NONE:
+            state = "NONE";
+            break;
+        case FILE_STATE_MAX:
+            break;
     }
 
     lua_pushstring (luastate, state);