mstask: ITaskTrigger::GetTrigger() should fail on NULL input.

dlls/mstask/task_trigger.c

@@ -211,6 +211,8 @@ static HRESULT WINAPI MSTASK_ITaskTrigger_GetTrigger(
 
     TRACE("(%p, %p)\n", iface, pTrigger);
 
+    if (!pTrigger) return E_INVALIDARG;
+
     /* Native implementation doesn't verify equivalent cbTriggerSize fields */
 
     /* Copy relevant fields of the structure */

dlls/mstask/tests/task_trigger.c

@@ -139,6 +139,9 @@ static void test_SetTrigger_GetTrigger(void)
     hres = ITaskTrigger_SetTrigger(test_trigger, NULL);
     ok(hres == E_INVALIDARG, "got %#x\n", hres);
 
+    hres = ITaskTrigger_GetTrigger(test_trigger, NULL);
+    ok(hres == E_INVALIDARG, "got %#x\n", hres);
+
     /* Setup a trigger with base values for this test run */
     GetLocalTime(&time);
     empty_trigger_state.wStartHour = time.wHour;