U472 - untrapping squeaky board with a can of grease

If using a permanent inventory window, the charges weren't updated immediately.

doc/fixes34.2

@@ -70,6 +70,7 @@ killer on tombstone had no prefix for starvation/exhaustion case
 ensure proper message ordering for boulder trap messages
 clean up data set by join_map that is overlaid by MAPs on special levels
 clarify disclose option default in opthelp, and support "all" as old help said
+add more calls to update_inventory as the inventory changes
 
 
 Platform- and/or Interface-Specific Fixes

src/trap.c

@@ -3152,6 +3152,7 @@ struct trap *ttmp;
 	if (obj->otyp == CAN_OF_GREASE) {
 	    check_unpaid(obj);
 	    obj->spe--;
+	    update_inventory();
 	} else {
 	    useup(obj);	/* oil */
 	    makeknown(POT_OIL);