Hopefully fix passes_pvp_interaction_checks crash (#343)

* Hopefully fix passes_pvp_interaction_checks crash
* Hopefully fix cur_obj_call_action_function crash

src/game/area.c

@@ -161,9 +161,7 @@ u32 get_mario_spawn_type(struct Object *o) {
 }
 
 struct ObjectWarpNode *area_get_warp_node(u8 id) {
-    if (gCurrentArea == NULL || gCurrentArea->warpNodes == NULL) {
+    if (!gCurrentArea || !gCurrentArea->warpNodes) { return NULL; }
-        return NULL;
-    }
 
     struct ObjectWarpNode *node = NULL;
 

src/game/interaction.c

@@ -1353,6 +1353,8 @@ u8 player_is_sliding(struct MarioState* m) {
 }
 
 u8 passes_pvp_interaction_checks(struct MarioState* attacker, struct MarioState* victim) {
+    if (!attacker || !victim) { return false; }
+
     // attacked
     u8 isInCutscene = ((attacker->action & ACT_GROUP_MASK) == ACT_GROUP_CUTSCENE) || ((victim->action & ACT_GROUP_MASK) == ACT_GROUP_CUTSCENE);
     isInCutscene = isInCutscene || (attacker->action == ACT_IN_CANNON) || (victim->action == ACT_IN_CANNON);

src/game/object_helpers.c

@@ -2664,7 +2664,10 @@ s32 cur_obj_move_up_and_down(s32 a0) {
 }
 
 void cur_obj_call_action_function(void (*actionFunctions[])(void)) {
+    if (!actionFunctions) { return; }
+
     void (*actionFunction)(void) = actionFunctions[o->oAction];
+    if (!actionFunction) { return; }
     actionFunction();
 }
 

src/pc/network/packets/packet_download.c

@@ -332,7 +332,7 @@ static void open_mod_file(struct Mod* mod, struct ModFile* file) {
 }
 
 void network_receive_download(struct Packet* p) {
-    if (p == NULL) {
+    if (!p) {
         LOG_ERROR("Received null packet");
         return;
     }