Fix toggling nextSlot value in ConstantPoolObjectSlotIterator.hpp

Added toggling `nextSlot` value back to `true` in `scanCondySlot()` when
`_condySlotState` is `condy_slot_exception`, so that the iterator will
go on to the next slot in constant pool if the value of the slot is
`NULL`

Signed-off-by: Charles_Zheng <[email protected]>

runtime/gc_structs/ConstantPoolObjectSlotIterator.hpp

@@ -78,6 +78,7 @@ class GC_ConstantPoolObjectSlotIterator
 		case condy_slot_exception:
 			result = &(((J9RAMConstantDynamicRef *) slotPtr)->exception);
 			_condySlotState = condy_slot_value;
+			*nextSlot = true;
 			break;
 		default:
 			Assert_MM_unreachable();