Fixed Onos ladder code

Onos ladder detection was assuming player was 64 units high instead of actual 108. By correcting the assumed hull size for Onos players, it now detects ladders as reliably as other player sizes.

main/source/pm_shared/pm_shared.cpp

@@ -4942,6 +4942,13 @@ physent_t *PM_Ladder( void )
             hull = (hull_t *)pmove->PM_HullForBsp( pe, test );
             num = hull->firstclipnode;
 
+            // Engine returns monster hull (64x64x64) for Onos, but Onos uses custom (64x64x108). We correct it here
+            if (pmove->iuser3 == AVH_USER3_ALIEN_PLAYER5)
+            {
+                hull->clip_mins[2] = -54.0f;
+                hull->clip_maxs[2] = 54.0f;
+            }
+    
             // Offset the test point appropriately for this hull.
             VectorSubtract ( pmove->origin, test, test);