Fixed an issue with invisible item shops

Thanks to @Everade

src/map/npc.cpp

@@ -2824,12 +2824,14 @@ static const char* npc_parse_shop(char* w1, char* w2, char* w3, char* w4, const
 		map_addnpc(m,nd);
 		if(map_addblock(&nd->bl))
 			return strchr(start,'\n');
-		status_set_viewdata(&nd->bl, nd->class_);
 		status_change_init(&nd->bl);
 		unit_dataset(&nd->bl);
 		nd->ud.dir = (uint8)dir;
-		if( map[nd->bl.m].users )
-			clif_spawn(&nd->bl);
+		if( nd->class_ != JT_FAKENPC ){
+			status_set_viewdata(&nd->bl, nd->class_);
+			if( map[nd->bl.m].users )
+				clif_spawn(&nd->bl);
+		}
 	} else
 	{// 'floating' shop?
 		map_addiddb(&nd->bl);
@@ -3059,7 +3061,7 @@ static const char* npc_parse_script(char* w1, char* w2, char* w3, char* w4, cons
 		npc_setcells(nd);
 		if(map_addblock(&nd->bl))
 			return NULL;
-		if( nd->class_ >= 0 )
+		if( nd->class_ != JT_FAKENPC )
 		{
 			status_set_viewdata(&nd->bl, nd->class_);
 			if( map[nd->bl.m].users )
@@ -3217,7 +3219,7 @@ const char* npc_parse_duplicate(char* w1, char* w2, char* w3, char* w4, const ch
 		npc_setcells(nd);
 		if(map_addblock(&nd->bl))
 			return end;
-		if( nd->class_ >= 0 ) {
+		if( nd->class_ != JT_FAKENPC ) {
 			status_set_viewdata(&nd->bl, nd->class_);
 			if( map[nd->bl.m].users )
 				clif_spawn(&nd->bl);

src/map/npc.hpp

@@ -1097,7 +1097,7 @@ enum e_job_types
 
 //Checks if a given id is a valid npc id. [Skotlex]
 //Since new npcs are added all the time, the max valid value is the one before the first mob (Scorpion = 1001)
-#define npcdb_checkid(id) ( ( (id) > NPC_RANGE1_START && (id) < NPC_RANGE1_END ) || (id) == JT_HIDDEN_WARP_NPC || ( (id) > NPC_RANGE2_START && (id) < NPC_RANGE2_END ) || (id) == JT_INVISIBLE || ( id > NPC_RANGE3_START && id < NPC_RANGE3_END ) )
+#define npcdb_checkid(id) ( ( (id) > NPC_RANGE1_START && (id) < NPC_RANGE1_END ) || (id) == JT_HIDDEN_WARP_NPC || ( (id) > NPC_RANGE2_START && (id) < NPC_RANGE2_END ) || (id) == JT_INVISIBLE || ( (id) > NPC_RANGE3_START && (id) < NPC_RANGE3_END ) )
 
 #ifdef PCRE_SUPPORT
 void npc_chat_finalize(struct npc_data* nd);