gauntlets of power removal encumbrance feedback

<Someone> reported that encumbrance feedback when removing GoP
was delayed until the next turn.  Several other places call encumber_msg()
to provide immediate feedback.  Call it in Gloves_off() too.

doc/fixes34.2

@@ -44,6 +44,7 @@ running that stops for closed doors should stop at mimics mimicking closed doors
 allow wishing for magenta potions (ignoring the rank name 'mage')
 fix an uninitialized memory access in non-quick dolookup
 fix were changing message that wasn't being displayed
+immediate encumbrance feedback when removing gauntlets of power
 
 
 Platform- and/or Interface-Specific Fixes

src/do_wear.c

@@ -431,6 +431,7 @@ Gloves_off()
     }
     setworn((struct obj *)0, W_ARMG);
     cancelled_don = FALSE;
+    (void) encumber_msg();		/* immediate feedback for GoP */
 
     /* Prevent wielding cockatrice when not wearing gloves */
     if (uwep && uwep->otyp == CORPSE &&