Fix implicit cast warnings seen.

core/src/main/java/com/threerings/io/ArrayMask.java

@@ -38,7 +38,7 @@ public class ArrayMask
      */
     public void set (int index)
     {
-        _mask[index/8] |= (1 << (index%8));
+        _mask[index/8] |= (byte)(1 << (index%8));
     }
 
     /**

core/src/main/java/com/threerings/presents/server/PresentsSession.java

@@ -373,7 +373,7 @@ public class PresentsSession
         // because we won't be closing their socket normally
         if (getConnection() != null) {
             long now = System.currentTimeMillis();
-            _connectTime += ((now - _networkStamp) / 1000);
+            _connectTime += (int)((now - _networkStamp) / 1000);
         }
     }
 
@@ -834,7 +834,7 @@ public class PresentsSession
             // if our connection is being cleared out, record the amount of time we were connected
             // to our total connected time
             if (conn == null) {
-                _connectTime += ((now - _networkStamp) / 1000);
+                _connectTime += (int)((now - _networkStamp) / 1000);
                 _messagesDropped = 0;
             }
 

core/src/main/java/com/threerings/util/StreamableEnumSet.java

@@ -145,7 +145,7 @@ public class StreamableEnumSet<E extends Enum<E>> extends AbstractSet<E>
             }
             public void remove () {
                 checkConcurrentModification();
-                _contents[_idx] &= ~(1 << _bit);
+                _contents[_idx] &= (byte)~(1 << _bit);
                 _size--;
                 _count--;
                 _omodcount = ++_modcount;
@@ -184,7 +184,7 @@ public class StreamableEnumSet<E extends Enum<E>> extends AbstractSet<E>
         int ordinal = _elementType.cast(o).ordinal();
         int idx = ordinal >> 3, mask = 1 << (ordinal & 0x07);
         if ((_contents[idx] & mask) == 0) {
-            _contents[idx] |= mask;
+            _contents[idx] |= (byte)mask;
             _size++;
             _modcount++;
             return true;
@@ -201,7 +201,7 @@ public class StreamableEnumSet<E extends Enum<E>> extends AbstractSet<E>
         int ordinal = ((Enum<?>)o).ordinal();
         int idx = ordinal >> 3, mask = 1 << (ordinal & 0x07);
         if ((_contents[idx] & mask) != 0) {
-            _contents[idx] &= ~mask;
+            _contents[idx] &= (byte)~mask;
             _size--;
             _modcount++;
             return true;