Fix getareaunits coordinates (#4155)

Co-Authored-By: AnnieRuru <annieruru@users.noreply.github.com>

src/map/script.cpp

@@ -11350,10 +11350,10 @@ BUILDIN_FUNC(getunits)
 			ShowWarning("buildin_%s: Unknown map '%s'.\n", command, str);
 			return SCRIPT_CMD_FAILURE;
 		}
-		x0 = script_getnum(st, 4);
-		y0 = script_getnum(st, 5);
-		x1 = script_getnum(st, 6);
-		y1 = script_getnum(st, 7);
+		x0 = min(script_getnum(st, 4), script_getnum(st, 6));
+		y0 = min(script_getnum(st, 5), script_getnum(st, 7));
+		x1 = max(script_getnum(st, 4), script_getnum(st, 6));
+		y1 = max(script_getnum(st, 5), script_getnum(st, 7));
 
 		if (script_hasdata(st, 8))
 			data = script_getdata(st, 8);
@@ -11385,7 +11385,7 @@ BUILDIN_FUNC(getunits)
 
 	for (bl = (struct block_list*)mapit_first(iter); mapit_exists(iter); bl = (struct block_list*)mapit_next(iter))
 	{
-		if (!m || (m == bl->m && !x0 && !y0 && !x1 && !y1) || (bl->m == m && (bl->x >= x0 && bl->y <= y0) && (bl->x <= x1 && bl->y >= y1)))
+		if (!m || (m == bl->m && !x0 && !y0 && !x1 && !y1) || (bl->m == m && (bl->x >= x0 && bl->y >= y0) && (bl->x <= x1 && bl->y <= y1)))
 		{
 			if (data)
 				set_reg(st, sd, reference_uid(id, idx + size), name, (is_string_variable(name) ? (void*)status_get_name(bl) : (void*)__64BPRTSIZE(bl->id)), reference_getref(data));