dedicated: fix thread build

src/dedicated/i_threads.c

@@ -15,7 +15,6 @@
 
 #include "../i_threads.h"
 #include "../doomdef.h"
-#include "../doomtype.h"
 
 typedef struct thread_s thread_t;
 

src/i_threads.h

@@ -12,6 +12,8 @@
 #ifndef I_THREADS_H
 #define I_THREADS_H
 
+#include "doomtype.h"
+
 typedef void (*I_thread_fn)(void *userdata);
 
 typedef void * I_mutex;