Add a precompiled header for RELs (#2597)

src/d/actor/d_a_obj_swBallA.cpp

@@ -3,6 +3,8 @@
  * 
 */
 
+#include "d/dolzel_rel.h"
+
 #include "d/actor/d_a_obj_swBallA.h"
 #include "d/actor/d_a_player.h"
 #include "d/actor/d_a_obj_carry.h"
@@ -140,8 +142,6 @@ int daObjSwBallA_c::Create() {
     return 1;
 }
 
-UNK_REL_DATA
-
 /* 80CF4438-80CF443C -00001 0004+00 3/3 0/0 0/0 .data            l_arcName */
 static char* l_arcName = "P_LBswA";