fix push pull callback UB in other compilers (zeldaret#3134)

Author: TakaRikka

include/d/actor/d_a_obj_iceblock.h

@@ -37,7 +37,7 @@ class daObjIceBlk_c : public dBgS_MoveBgActor {
         ACTION_DEAD_e,
     };
 
-    static void PPCallBack(fopAc_ac_c*, fopAc_ac_c*, s16, dBgW_Base::PushPullLabel);
+    static fopAc_ac_c* PPCallBack(fopAc_ac_c*, fopAc_ac_c*, s16, dBgW_Base::PushPullLabel);
     void initBaseMtx();
     void setBaseMtx();
     u16 getPointNo();

src/d/actor/d_a_door_push.cpp

@@ -11,24 +11,28 @@
 #include "f_pc/f_pc_name.h"
 #include "f_op/f_op_actor_mng.h"
 
-static void PPCallBack(fopAc_ac_c* i_this, fopAc_ac_c* i_unused, s16 i_unused2,
+static fopAc_ac_c* PPCallBack(fopAc_ac_c* i_this, fopAc_ac_c* i_unused, s16 i_unused2,
                        dBgW_Base::PushPullLabel param_3) {
     if (cLib_checkBit(param_3, dBgW_Base::PPLABEL_PUSH) != 0) {
         daDoorPush_c* l_this = (daDoorPush_c*)i_this;
         l_this->field_0x62e[0]++;
         l_this->field_0x62e[1] = 0;
         l_this->field_0x62c[0] = 1;
     }
+
+    return i_this;
 }
 
-static void PPCallBack2(fopAc_ac_c* i_this, fopAc_ac_c* i_unused, s16 i_unused2,
+static fopAc_ac_c* PPCallBack2(fopAc_ac_c* i_this, fopAc_ac_c* i_unused, s16 i_unused2,
                         dBgW_Base::PushPullLabel param_3) {
     if (cLib_checkBit(param_3, dBgW_Base::PPLABEL_PUSH) != 0) {
         daDoorPush_c* l_this = (daDoorPush_c*)i_this;
         l_this->field_0x62e[1]++;
         l_this->field_0x62e[0] = 0;
         l_this->field_0x62c[1] = 1;
     }
+
+    return i_this;
 }
 
 void daDoorPush_c::initBaseMtx() {

src/d/actor/d_a_obj_iceblock.cpp

@@ -25,7 +25,7 @@ enum WALK_TYPE {
     WALK_IRON_BALL_HIT,
 };
 
-void daObjIceBlk_c::PPCallBack(fopAc_ac_c* i_bgActor, fopAc_ac_c* i_pushActor, s16 i_angle,
+fopAc_ac_c* daObjIceBlk_c::PPCallBack(fopAc_ac_c* i_bgActor, fopAc_ac_c* i_pushActor, s16 i_angle,
                                dBgW_Base::PushPullLabel i_label) {
     bool temp_r3 = cLib_checkBit<u8>(i_label, dBgW::PPLABEL_PUSH) != 0;
     bool temp_r3_2 = cLib_checkBit<u8>(i_label, dBgW::PPLABEL_PUSH) != 0;
@@ -54,6 +54,7 @@ void daObjIceBlk_c::PPCallBack(fopAc_ac_c* i_bgActor, fopAc_ac_c* i_pushActor, s
     }
 
     ((daObjIceBlk_c*)i_bgActor)->mPPLabel = i_label;
+    return i_bgActor;
 }
 
 static void rideCallBack(dBgW* i_bgw, fopAc_ac_c* i_bgActor, fopAc_ac_c* i_rideActor) {