Fix temp skill not removed (#7939)

Fixes #5382

src/map/clif.cpp

@@ -5799,7 +5799,7 @@ void clif_addskill(map_session_data *sd, int skill_id)
 
 /// Deletes a skill from the skill tree (ZC_SKILLINFO_DELETE).
 /// 0441 <skill id>.W
-void clif_deleteskill(map_session_data *sd, int skill_id)
+void clif_deleteskill(map_session_data *sd, int skill_id, bool skip_infoblock)
 {
 #if PACKETVER >= 20081217
 	nullpo_retv(sd);
@@ -5815,7 +5815,10 @@ void clif_deleteskill(map_session_data *sd, int skill_id)
 	WFIFOW(fd,2) = skill_id;
 	WFIFOSET(fd,packet_len(0x441));
 #endif
-	clif_skillinfoblock(sd);
+#if PACKETVER_MAIN_NUM >= 20190807 || PACKETVER_RE_NUM >= 20190807 || PACKETVER_ZERO_NUM >= 20190918
+	if (!skip_infoblock)
+#endif
+		clif_skillinfoblock(sd);
 }
 
 /// Updates a skill in the skill tree (ZC_SKILLINFO_UPDATE).

src/map/clif.hpp

@@ -735,7 +735,7 @@ void clif_skillinfoblock(map_session_data *sd);
 void clif_skillup(map_session_data *sd, uint16 skill_id, int lv, int range, int upgradable);
 void clif_skillinfo(map_session_data *sd,int skill_id, int inf);
 void clif_addskill(map_session_data *sd, int skill_id);
-void clif_deleteskill(map_session_data *sd, int skill_id);
+void clif_deleteskill(map_session_data *sd, int skill_id, bool skip_infoblock = false);
 
 void clif_skillcasting(struct block_list* bl, int src_id, int dst_id, int dst_x, int dst_y, uint16 skill_id, uint16 skill_lv, int property, int casttime);
 void clif_skillcastcancel(struct block_list* bl);

src/map/status.cpp

@@ -4833,8 +4833,16 @@ int status_calc_pc_sub(map_session_data* sd, uint8 opt)
 		calculating = 0;
 		return 0;
 	}
-	if(memcmp(b_skill,sd->status.skill,sizeof(sd->status.skill)))
+	if(memcmp(b_skill,sd->status.skill,sizeof(sd->status.skill))) {
+#if PACKETVER_MAIN_NUM >= 20190807 || PACKETVER_RE_NUM >= 20190807 || PACKETVER_ZERO_NUM >= 20190918
+		// Client doesn't delete unavailable skills even if we refresh the skill tree, individually delete them.
+		for (i = 0; i < MAX_SKILL; i++) {
+			if (b_skill[i].id != 0 && sd->status.skill[i].id == 0)
+				clif_deleteskill(sd, b_skill[i].id, true);
+		}
+#endif
 		clif_skillinfoblock(sd);
+	}
 
 	// If the skill is learned, the status is infinite.
 	if (pc_checkskill(sd, SU_SPRITEMABLE) > 0 && !sd->sc.getSCE(SC_SPRITEMABLE))