[Doors] Fix issue where NPC's wouldn't open doors because door param overflow

[Akkadius]

What

This fixes a datatype issue preventing NPC's from being able to open doors because their AI logic checks for door_param > 0 then don't open door.

Because -1 or sub-zero values are being loaded into an unsigned integer, this is overflowing those values into positives causing the discrepancy in behavior.

Tested and fixed, in Griegs End, all doors are -1

door-open-fix.mp4

select count(*) as count, door_param from doors group by door_param having count > 10;
+-------+------------+
| count | door_param |
+-------+------------+
|    54 |         -3 |
|  7497 |         -1 |
|  8032 |          0 |
|   125 |          1 |
|    22 |          2 |
|    83 |          5 |
|   109 |          6 |
|    33 |          7 |
|    31 |          9 |
|   267 |         10 |
|    85 |         11 |
|   114 |         12 |
|   107 |         13 |
|    97 |         14 |
|    55 |         15 |
|   140 |         16 |
|    18 |         17 |
|    11 |         20 |
|    83 |         23 |
|    11 |         24 |
|    12 |         25 |
|    18 |         30 |
|    11 |         32 |
|    15 |         64 |
|    21 |         65 |
|    13 |         66 |
|    14 |         67 |
|    11 |         70 |
|    62 |        100 |
|    18 |        101 |
|    22 |        102 |
|   172 |        103 |
|    99 |        104 |
|   152 |        105 |
|    23 |        112 |
|    52 |        116 |
|    14 |        120 |
|    42 |        122 |
|    13 |        128 |
|   622 |        132 |
|    23 |        142 |
|    19 |        145 |
|    13 |        190 |
|   105 |       1500 |
+-------+------------+
44 rows in set (0.00 sec)

[Akkadius]

cc @noudess