Fixed potential crash in pc_bonus (#2423)

* Fixes #2420.
* If a bonus script command is used in an NPC with a non-existent bonus type, the server crashes.
Thanks to @vstumpf and @anacondaqq!

src/map/pc.c

@@ -3129,9 +3129,12 @@ void pc_bonus(struct map_session_data *sd,int type,int val)
 			else if (current_equip_combo_pos > 0) {
 				ShowWarning("pc_bonus: unknown bonus type %d %d in a combo with item #%d\n", type, val, sd->inventory_data[pc_checkequip( sd, current_equip_combo_pos )]->nameid);
 			}
-			else {
+			else if (current_equip_card_id > 0 || current_equip_item_index > 0) {
 				ShowWarning("pc_bonus: unknown bonus type %d %d in item #%d\n", type, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
 			}
+			else {
+				ShowWarning("pc_bonus: unknown bonus type %d %d in unknown usage. Report this!\n", type, val);
+			}
 			break;
 	}
 }
@@ -3810,9 +3813,12 @@ void pc_bonus2(struct map_session_data *sd,int type,int type2,int val)
 		}
 		else if (current_equip_combo_pos > 0) {
 			ShowWarning("pc_bonus2: unknown bonus type %d %d %d in a combo with item #%d\n", type, type2, val, sd->inventory_data[pc_checkequip( sd, current_equip_combo_pos )]->nameid);
+		} 
+		else if (current_equip_card_id > 0 || current_equip_item_index > 0) {
+			ShowWarning("pc_bonus2: unknown bonus type %d %d %d in item #%d\n", type, type2, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
 		}
 		else {
-			ShowWarning("pc_bonus2: unknown bonus type %d %d %d in item #%d\n", type, type2, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
+			ShowWarning("pc_bonus2: unknown bonus type %d %d %d in unknown usage. Report this!\n", type, type2, val);
 		}
 		break;
 	}
@@ -3934,9 +3940,12 @@ void pc_bonus3(struct map_session_data *sd,int type,int type2,int type3,int val)
 		else if (current_equip_combo_pos > 0) {
 			ShowWarning("pc_bonus3: unknown bonus type %d %d %d %d in a combo with item #%d\n", type, type2, type3, val, sd->inventory_data[pc_checkequip( sd, current_equip_combo_pos )]->nameid);
 		}
-		else {
+		else if (current_equip_card_id > 0 || current_equip_item_index > 0) {
 			ShowWarning("pc_bonus3: unknown bonus type %d %d %d %d in item #%d\n", type, type2, type3, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
 		}
+		else {
+			ShowWarning("pc_bonus3: unknown bonus type %d %d %d %d in unknown usage. Report this!\n", type, type2, type3, val);
+		}
 		break;
 	}
 }
@@ -4017,9 +4026,12 @@ void pc_bonus4(struct map_session_data *sd,int type,int type2,int type3,int type
 		else if (current_equip_combo_pos > 0) {
 			ShowWarning("pc_bonus4: unknown bonus type %d %d %d %d %d in a combo with item #%d\n", type, type2, type3, type4, val, sd->inventory_data[pc_checkequip( sd, current_equip_combo_pos )]->nameid);
 		}
-		else {
+		else if (current_equip_card_id > 0 || current_equip_item_index > 0) {
 			ShowWarning("pc_bonus4: unknown bonus type %d %d %d %d %d in item #%d\n", type, type2, type3, type4, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
 		}
+		else {
+			ShowWarning("pc_bonus4: unknown bonus type %d %d %d %d %d in unknown usage. Report this!\n", type, type2, type3, type4, val);
+		}
 		break;
 	}
 }
@@ -4066,9 +4078,12 @@ void pc_bonus5(struct map_session_data *sd,int type,int type2,int type3,int type
 		else if (current_equip_combo_pos > 0) {
 			ShowWarning("pc_bonus5: unknown bonus type %d %d %d %d %d %d in a combo with item #%d\n", type, type2, type3, type4, type5, val, sd->inventory_data[pc_checkequip( sd, current_equip_combo_pos )]->nameid);
 		}
-		else {
+		else if (current_equip_card_id > 0 || current_equip_item_index > 0) {
 			ShowWarning("pc_bonus5: unknown bonus type %d %d %d %d %d %d in item #%d\n", type, type2, type3, type4, type5, val, current_equip_card_id ? current_equip_card_id : sd->inventory_data[current_equip_item_index]->nameid);
 		}
+		else {
+			ShowWarning("pc_bonus5: unknown bonus type %d %d %d %d %d %d in unknown usage. Report this!\n", type, type2, type3, type4, type5, val);
+		}
 		break;
 	}
 }