cc3200: Fix extint_enable behaviour when the callback is updated.

cc3200/mods/pybpin.c

@@ -331,11 +331,15 @@ STATIC void pin_extint_enable (mp_obj_t self_in) {
             MAP_PRCMHibernateWakeupSourceDisable(hib_pin);
         }
     }
-    // if idx is invalid, the the pin supports active_idle interrupts for sure
+    // if idx is invalid, the the pin supports active interrupts for sure
     if (idx >= PYBPIN_NUM_WAKE_PINS || pybpin_wake_pin[idx].active) {
         MAP_GPIOIntClear(self->port, self->bit);
         MAP_GPIOIntEnable(self->port, self->bit);
     }
+    // in case in was enabled before
+    else if (idx < PYBPIN_NUM_WAKE_PINS && !pybpin_wake_pin[idx].active) {
+        MAP_GPIOIntDisable(self->port, self->bit);
+    }
 }
 
 STATIC void pin_extint_disable (mp_obj_t self_in) {